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Finding the Fourth Proportional to 624.39, 938.12 and 393.75

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Solution

The fourth proportional to 624.39, 938.12 and 393.75 is: 591.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.39 : 938.12 = 393.75 : x
  2. Step 2: Convert to fraction form
    624.39/938.12 = 393.75/x
  3. Step 3: Cross multiply
    624.39x = 938.12 × 393.75
  4. Step 4: Simplify right side
    624.39x = 369,382.78
  5. Step 5: Solve for x
    x = 369,382.78/624.39
  6. Step 6: Final answer
    x = 591.59

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Double scale
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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.