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Finding the Fourth Proportional to 552.96, 762.55 and 442.13

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Solution

The fourth proportional to 552.96, 762.55 and 442.13 is: 609.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.96 : 762.55 = 442.13 : x
  2. Step 2: Convert to fraction form
    552.96/762.55 = 442.13/x
  3. Step 3: Cross multiply
    552.96x = 762.55 × 442.13
  4. Step 4: Simplify right side
    552.96x = 337,141.31
  5. Step 5: Solve for x
    x = 337,141.31/552.96
  6. Step 6: Final answer
    x = 609.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.