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Finding the Fourth Proportional to 709,260,153.26, 978,780,909.53 and 396,005,576.41

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Solution

The fourth proportional to 709,260,153.26, 978,780,909.53 and 396,005,576.41 is: 546,488,755.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,260,153.26 : 978,780,909.53 = 396,005,576.41 : x
  2. Step 2: Convert to fraction form
    709,260,153.26/978,780,909.53 = 396,005,576.41/x
  3. Step 3: Cross multiply
    709,260,153.26x = 978,780,909.53 × 396,005,576.41
  4. Step 4: Simplify right side
    709,260,153.26x = 387,602,698,254,234,688
  5. Step 5: Solve for x
    x = 387,602,698,254,234,688/709,260,153.26
  6. Step 6: Final answer
    x = 546,488,755.18

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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.