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Finding the Fourth Proportional to 647,694,515.80, 971,541,773.70 and 372,195,501.40

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Solution

The fourth proportional to 647,694,515.80, 971,541,773.70 and 372,195,501.40 is: 558,293,252.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,694,515.80 : 971,541,773.70 = 372,195,501.40 : x
  2. Step 2: Convert to fraction form
    647,694,515.80/971,541,773.70 = 372,195,501.40/x
  3. Step 3: Cross multiply
    647,694,515.80x = 971,541,773.70 × 372,195,501.40
  4. Step 4: Simplify right side
    647,694,515.80x = 361,603,477,593,316,800
  5. Step 5: Solve for x
    x = 361,603,477,593,316,800/647,694,515.80
  6. Step 6: Final answer
    x = 558,293,252.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.