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Finding the Fourth Proportional to 471.51, 707.29 and 124.85

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Solution

The fourth proportional to 471.51, 707.29 and 124.85 is: 187.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.51 : 707.29 = 124.85 : x
  2. Step 2: Convert to fraction form
    471.51/707.29 = 124.85/x
  3. Step 3: Cross multiply
    471.51x = 707.29 × 124.85
  4. Step 4: Simplify right side
    471.51x = 88,305.16
  5. Step 5: Solve for x
    x = 88,305.16/471.51
  6. Step 6: Final answer
    x = 187.28

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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.