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Finding the Fourth Proportional to 280,793.97, 387,495 and 153,470.52

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Solution

The fourth proportional to 280,793.97, 387,495 and 153,470.52 is: 211,788.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,793.97 : 387,495 = 153,470.52 : x
  2. Step 2: Convert to fraction form
    280,793.97/387,495 = 153,470.52/x
  3. Step 3: Cross multiply
    280,793.97x = 387,495 × 153,470.52
  4. Step 4: Simplify right side
    280,793.97x = 59,469,059,147.40
  5. Step 5: Solve for x
    x = 59,469,059,147.40/280,793.97
  6. Step 6: Final answer
    x = 211,788.95

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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.