Home / 1,217,998,995.22-1,680,839,857.38-661,082,157.10

Finding the Fourth Proportional to 1,217,998,995.22, 1,680,839,857.38 and 661,082,157.10

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Solution

The fourth proportional to 1,217,998,995.22, 1,680,839,857.38 and 661,082,157.10 is: 912,294,051.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,998,995.22 : 1,680,839,857.38 = 661,082,157.10 : x
  2. Step 2: Convert to fraction form
    1,217,998,995.22/1,680,839,857.38 = 661,082,157.10/x
  3. Step 3: Cross multiply
    1,217,998,995.22x = 1,680,839,857.38 × 661,082,157.10
  4. Step 4: Simplify right side
    1,217,998,995.22x = 1,111,173,238,653,084,288
  5. Step 5: Solve for x
    x = 1,111,173,238,653,084,288/1,217,998,995.22
  6. Step 6: Final answer
    x = 912,294,051.98

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Double scale
Find fourth proportional to 1,217,998,996.22, 1,680,839,858.76 and 661,082,158.10
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.