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Finding the Fourth Proportional to 265,804,580.80, 398,781,520.80 and 129,494,411.20

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Solution

The fourth proportional to 265,804,580.80, 398,781,520.80 and 129,494,411.20 is: 194,277,984.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,804,580.80 : 398,781,520.80 = 129,494,411.20 : x
  2. Step 2: Convert to fraction form
    265,804,580.80/398,781,520.80 = 129,494,411.20/x
  3. Step 3: Cross multiply
    265,804,580.80x = 398,781,520.80 × 129,494,411.20
  4. Step 4: Simplify right side
    265,804,580.80x = 51,639,978,233,436,552
  5. Step 5: Solve for x
    x = 51,639,978,233,436,552/265,804,580.80
  6. Step 6: Final answer
    x = 194,277,984.52

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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.