Home / 642,155.33-963,279.17-221,425.13

Finding the Fourth Proportional to 642,155.33, 963,279.17 and 221,425.13

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Solution

The fourth proportional to 642,155.33, 963,279.17 and 221,425.13 is: 332,153.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,155.33 : 963,279.17 = 221,425.13 : x
  2. Step 2: Convert to fraction form
    642,155.33/963,279.17 = 221,425.13/x
  3. Step 3: Cross multiply
    642,155.33x = 963,279.17 × 221,425.13
  4. Step 4: Simplify right side
    642,155.33x = 213,294,209,520.02
  5. Step 5: Solve for x
    x = 213,294,209,520.02/642,155.33
  6. Step 6: Final answer
    x = 332,153.61

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Double scale
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1.5x scale

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.