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Finding the Fourth Proportional to 471.49, 707.24 and 124.80

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Solution

The fourth proportional to 471.49, 707.24 and 124.80 is: 187.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.49 : 707.24 = 124.80 : x
  2. Step 2: Convert to fraction form
    471.49/707.24 = 124.80/x
  3. Step 3: Cross multiply
    471.49x = 707.24 × 124.80
  4. Step 4: Simplify right side
    471.49x = 88,262.93
  5. Step 5: Solve for x
    x = 88,262.93/471.49
  6. Step 6: Final answer
    x = 187.20

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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.