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Finding the Fourth Proportional to 627.46, 863.65 and 521.38

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Solution

The fourth proportional to 627.46, 863.65 and 521.38 is: 717.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.46 : 863.65 = 521.38 : x
  2. Step 2: Convert to fraction form
    627.46/863.65 = 521.38/x
  3. Step 3: Cross multiply
    627.46x = 863.65 × 521.38
  4. Step 4: Simplify right side
    627.46x = 450,289.84
  5. Step 5: Solve for x
    x = 450,289.84/627.46
  6. Step 6: Final answer
    x = 717.64

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Double scale
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1.5x scale

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.