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Finding the Fourth Proportional to 534.72, 806.16 and 439.68

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Solution

The fourth proportional to 534.72, 806.16 and 439.68 is: 662.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.72 : 806.16 = 439.68 : x
  2. Step 2: Convert to fraction form
    534.72/806.16 = 439.68/x
  3. Step 3: Cross multiply
    534.72x = 806.16 × 439.68
  4. Step 4: Simplify right side
    534.72x = 354,452.43
  5. Step 5: Solve for x
    x = 354,452.43/534.72
  6. Step 6: Final answer
    x = 662.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.