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Finding the Fourth Proportional to 494.68, 742.65 and 403.56

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Solution

The fourth proportional to 494.68, 742.65 and 403.56 is: 605.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.68 : 742.65 = 403.56 : x
  2. Step 2: Convert to fraction form
    494.68/742.65 = 403.56/x
  3. Step 3: Cross multiply
    494.68x = 742.65 × 403.56
  4. Step 4: Simplify right side
    494.68x = 299,700.12
  5. Step 5: Solve for x
    x = 299,700.12/494.68
  6. Step 6: Final answer
    x = 605.85

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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.