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Finding the Fourth Proportional to 477.90, 715.23 and 271.89

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Solution

The fourth proportional to 477.90, 715.23 and 271.89 is: 406.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.90 : 715.23 = 271.89 : x
  2. Step 2: Convert to fraction form
    477.90/715.23 = 271.89/x
  3. Step 3: Cross multiply
    477.90x = 715.23 × 271.89
  4. Step 4: Simplify right side
    477.90x = 194,463.88
  5. Step 5: Solve for x
    x = 194,463.88/477.90
  6. Step 6: Final answer
    x = 406.91

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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.