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Finding the Fourth Proportional to 457.25, 685.88 and 434.18

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Solution

The fourth proportional to 457.25, 685.88 and 434.18 is: 651.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.25 : 685.88 = 434.18 : x
  2. Step 2: Convert to fraction form
    457.25/685.88 = 434.18/x
  3. Step 3: Cross multiply
    457.25x = 685.88 × 434.18
  4. Step 4: Simplify right side
    457.25x = 297,795.38
  5. Step 5: Solve for x
    x = 297,795.38/457.25
  6. Step 6: Final answer
    x = 651.27

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Double scale
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Similar ratio
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1.5x scale

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.