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Finding the Fourth Proportional to 472.74, 709.05 and 126.10

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Solution

The fourth proportional to 472.74, 709.05 and 126.10 is: 189.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.74 : 709.05 = 126.10 : x
  2. Step 2: Convert to fraction form
    472.74/709.05 = 126.10/x
  3. Step 3: Cross multiply
    472.74x = 709.05 × 126.10
  4. Step 4: Simplify right side
    472.74x = 89,411.52
  5. Step 5: Solve for x
    x = 89,411.52/472.74
  6. Step 6: Final answer
    x = 189.13

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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.