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Finding the Fourth Proportional to 477.52, 715.98 and 217.40

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Solution

The fourth proportional to 477.52, 715.98 and 217.40 is: 325.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.52 : 715.98 = 217.40 : x
  2. Step 2: Convert to fraction form
    477.52/715.98 = 217.40/x
  3. Step 3: Cross multiply
    477.52x = 715.98 × 217.40
  4. Step 4: Simplify right side
    477.52x = 155,654.05
  5. Step 5: Solve for x
    x = 155,654.05/477.52
  6. Step 6: Final answer
    x = 325.96

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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.