Home / 1,217,964,390.64-1,680,598,872.96-709,410,800.32

Finding the Fourth Proportional to 1,217,964,390.64, 1,680,598,872.96 and 709,410,800.32

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Solution

The fourth proportional to 1,217,964,390.64, 1,680,598,872.96 and 709,410,800.32 is: 978,875,080.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,964,390.64 : 1,680,598,872.96 = 709,410,800.32 : x
  2. Step 2: Convert to fraction form
    1,217,964,390.64/1,680,598,872.96 = 709,410,800.32/x
  3. Step 3: Cross multiply
    1,217,964,390.64x = 1,680,598,872.96 × 709,410,800.32
  4. Step 4: Simplify right side
    1,217,964,390.64x = 1,192,234,991,483,443,712
  5. Step 5: Solve for x
    x = 1,192,234,991,483,443,712/1,217,964,390.64
  6. Step 6: Final answer
    x = 978,875,080.95

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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.