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Finding the Fourth Proportional to 498.19, 748.22 and 457.56

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Solution

The fourth proportional to 498.19, 748.22 and 457.56 is: 687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.19 : 748.22 = 457.56 : x
  2. Step 2: Convert to fraction form
    498.19/748.22 = 457.56/x
  3. Step 3: Cross multiply
    498.19x = 748.22 × 457.56
  4. Step 4: Simplify right side
    498.19x = 342,355.54
  5. Step 5: Solve for x
    x = 342,355.54/498.19
  6. Step 6: Final answer
    x = 687.20

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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.