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Finding the Fourth Proportional to 521.92, 723.55 and 494.18

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Solution

The fourth proportional to 521.92, 723.55 and 494.18 is: 685.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.92 : 723.55 = 494.18 : x
  2. Step 2: Convert to fraction form
    521.92/723.55 = 494.18/x
  3. Step 3: Cross multiply
    521.92x = 723.55 × 494.18
  4. Step 4: Simplify right side
    521.92x = 357,557.85
  5. Step 5: Solve for x
    x = 357,557.85/521.92
  6. Step 6: Final answer
    x = 685.08

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.