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Finding the Fourth Proportional to 457.97, 685.35 and 374.74

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Solution

The fourth proportional to 457.97, 685.35 and 374.74 is: 560.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.97 : 685.35 = 374.74 : x
  2. Step 2: Convert to fraction form
    457.97/685.35 = 374.74/x
  3. Step 3: Cross multiply
    457.97x = 685.35 × 374.74
  4. Step 4: Simplify right side
    457.97x = 256,827.28
  5. Step 5: Solve for x
    x = 256,827.28/457.97
  6. Step 6: Final answer
    x = 560.80

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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.