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Finding the Fourth Proportional to 460.40, 687.28 and 426.62

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Solution

The fourth proportional to 460.40, 687.28 and 426.62 is: 636.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.40 : 687.28 = 426.62 : x
  2. Step 2: Convert to fraction form
    460.40/687.28 = 426.62/x
  3. Step 3: Cross multiply
    460.40x = 687.28 × 426.62
  4. Step 4: Simplify right side
    460.40x = 293,207.39
  5. Step 5: Solve for x
    x = 293,207.39/460.40
  6. Step 6: Final answer
    x = 636.85

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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.