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Finding the Fourth Proportional to 477.28, 715.66 and 258.17

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Solution

The fourth proportional to 477.28, 715.66 and 258.17 is: 387.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.28 : 715.66 = 258.17 : x
  2. Step 2: Convert to fraction form
    477.28/715.66 = 258.17/x
  3. Step 3: Cross multiply
    477.28x = 715.66 × 258.17
  4. Step 4: Simplify right side
    477.28x = 184,761.94
  5. Step 5: Solve for x
    x = 184,761.94/477.28
  6. Step 6: Final answer
    x = 387.11

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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.