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Finding the Fourth Proportional to 626.92, 863.54 and 521.80

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Solution

The fourth proportional to 626.92, 863.54 and 521.80 is: 718.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.92 : 863.54 = 521.80 : x
  2. Step 2: Convert to fraction form
    626.92/863.54 = 521.80/x
  3. Step 3: Cross multiply
    626.92x = 863.54 × 521.80
  4. Step 4: Simplify right side
    626.92x = 450,595.17
  5. Step 5: Solve for x
    x = 450,595.17/626.92
  6. Step 6: Final answer
    x = 718.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.