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Finding the Fourth Proportional to 669.28, 996.68 and 627.76

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Solution

The fourth proportional to 669.28, 996.68 and 627.76 is: 934.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.28 : 996.68 = 627.76 : x
  2. Step 2: Convert to fraction form
    669.28/996.68 = 627.76/x
  3. Step 3: Cross multiply
    669.28x = 996.68 × 627.76
  4. Step 4: Simplify right side
    669.28x = 625,675.84
  5. Step 5: Solve for x
    x = 625,675.84/669.28
  6. Step 6: Final answer
    x = 934.85

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1.5x scale

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.