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Finding the Fourth Proportional to 477.49, 716.64 and 381.91

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Solution

The fourth proportional to 477.49, 716.64 and 381.91 is: 573.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.49 : 716.64 = 381.91 : x
  2. Step 2: Convert to fraction form
    477.49/716.64 = 381.91/x
  3. Step 3: Cross multiply
    477.49x = 716.64 × 381.91
  4. Step 4: Simplify right side
    477.49x = 273,691.98
  5. Step 5: Solve for x
    x = 273,691.98/477.49
  6. Step 6: Final answer
    x = 573.19

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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.