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Finding the Fourth Proportional to 487.71, 730.40 and 271.17

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Solution

The fourth proportional to 487.71, 730.40 and 271.17 is: 406.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.71 : 730.40 = 271.17 : x
  2. Step 2: Convert to fraction form
    487.71/730.40 = 271.17/x
  3. Step 3: Cross multiply
    487.71x = 730.40 × 271.17
  4. Step 4: Simplify right side
    487.71x = 198,061.21
  5. Step 5: Solve for x
    x = 198,061.21/487.71
  6. Step 6: Final answer
    x = 406.10

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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.