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Finding the Fourth Proportional to 474.47, 711.68 and 149.81

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Solution

The fourth proportional to 474.47, 711.68 and 149.81 is: 224.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.47 : 711.68 = 149.81 : x
  2. Step 2: Convert to fraction form
    474.47/711.68 = 149.81/x
  3. Step 3: Cross multiply
    474.47x = 711.68 × 149.81
  4. Step 4: Simplify right side
    474.47x = 106,616.78
  5. Step 5: Solve for x
    x = 106,616.78/474.47
  6. Step 6: Final answer
    x = 224.71

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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.