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Finding the Fourth Proportional to 477.25, 715.97 and 220.75

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Solution

The fourth proportional to 477.25, 715.97 and 220.75 is: 331.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.25 : 715.97 = 220.75 : x
  2. Step 2: Convert to fraction form
    477.25/715.97 = 220.75/x
  3. Step 3: Cross multiply
    477.25x = 715.97 × 220.75
  4. Step 4: Simplify right side
    477.25x = 158,050.38
  5. Step 5: Solve for x
    x = 158,050.38/477.25
  6. Step 6: Final answer
    x = 331.17

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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.