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Finding the Fourth Proportional to 471.60, 706.72 and 439.48

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Solution

The fourth proportional to 471.60, 706.72 and 439.48 is: 658.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.60 : 706.72 = 439.48 : x
  2. Step 2: Convert to fraction form
    471.60/706.72 = 439.48/x
  3. Step 3: Cross multiply
    471.60x = 706.72 × 439.48
  4. Step 4: Simplify right side
    471.60x = 310,589.31
  5. Step 5: Solve for x
    x = 310,589.31/471.60
  6. Step 6: Final answer
    x = 658.59

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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.