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Finding the Fourth Proportional to 752.60, 1,123.97 and 630.96

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Solution

The fourth proportional to 752.60, 1,123.97 and 630.96 is: 942.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.60 : 1,123.97 = 630.96 : x
  2. Step 2: Convert to fraction form
    752.60/1,123.97 = 630.96/x
  3. Step 3: Cross multiply
    752.60x = 1,123.97 × 630.96
  4. Step 4: Simplify right side
    752.60x = 709,176.96
  5. Step 5: Solve for x
    x = 709,176.96/752.60
  6. Step 6: Final answer
    x = 942.30

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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.