Home / 821,609,157.71-1,133,942,328.72-520,222,482.15

Finding the Fourth Proportional to 821,609,157.71, 1,133,942,328.72 and 520,222,482.15

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Solution

The fourth proportional to 821,609,157.71, 1,133,942,328.72 and 520,222,482.15 is: 717,984,077.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,609,157.71 : 1,133,942,328.72 = 520,222,482.15 : x
  2. Step 2: Convert to fraction form
    821,609,157.71/1,133,942,328.72 = 520,222,482.15/x
  3. Step 3: Cross multiply
    821,609,157.71x = 1,133,942,328.72 × 520,222,482.15
  4. Step 4: Simplify right side
    821,609,157.71x = 589,902,292,861,669,632
  5. Step 5: Solve for x
    x = 589,902,292,861,669,632/821,609,157.71
  6. Step 6: Final answer
    x = 717,984,077.14

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Double scale
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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.