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Finding the Fourth Proportional to 507.68, 761.96 and 449.28

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Solution

The fourth proportional to 507.68, 761.96 and 449.28 is: 674.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.68 : 761.96 = 449.28 : x
  2. Step 2: Convert to fraction form
    507.68/761.96 = 449.28/x
  3. Step 3: Cross multiply
    507.68x = 761.96 × 449.28
  4. Step 4: Simplify right side
    507.68x = 342,335.20
  5. Step 5: Solve for x
    x = 342,335.20/507.68
  6. Step 6: Final answer
    x = 674.31

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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.