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Finding the Fourth Proportional to 457.47, 680.74 and 426.87

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Solution

The fourth proportional to 457.47, 680.74 and 426.87 is: 635.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.47 : 680.74 = 426.87 : x
  2. Step 2: Convert to fraction form
    457.47/680.74 = 426.87/x
  3. Step 3: Cross multiply
    457.47x = 680.74 × 426.87
  4. Step 4: Simplify right side
    457.47x = 290,586.42
  5. Step 5: Solve for x
    x = 290,586.42/457.47
  6. Step 6: Final answer
    x = 635.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.