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Finding the Fourth Proportional to 471.13, 706.69 and 129.13

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Solution

The fourth proportional to 471.13, 706.69 and 129.13 is: 193.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.13 : 706.69 = 129.13 : x
  2. Step 2: Convert to fraction form
    471.13/706.69 = 129.13/x
  3. Step 3: Cross multiply
    471.13x = 706.69 × 129.13
  4. Step 4: Simplify right side
    471.13x = 91,251.35
  5. Step 5: Solve for x
    x = 91,251.35/471.13
  6. Step 6: Final answer
    x = 193.69

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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.