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Finding the Fourth Proportional to 638,187.76, 880,687.28 and 347,801.65

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Solution

The fourth proportional to 638,187.76, 880,687.28 and 347,801.65 is: 479,959.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,187.76 : 880,687.28 = 347,801.65 : x
  2. Step 2: Convert to fraction form
    638,187.76/880,687.28 = 347,801.65/x
  3. Step 3: Cross multiply
    638,187.76x = 880,687.28 × 347,801.65
  4. Step 4: Simplify right side
    638,187.76x = 306,304,487,785.80
  5. Step 5: Solve for x
    x = 306,304,487,785.80/638,187.76
  6. Step 6: Final answer
    x = 479,959.83

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Double scale
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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.