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Finding the Fourth Proportional to 752.23, 1,126.41 and 387.19

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Solution

The fourth proportional to 752.23, 1,126.41 and 387.19 is: 579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.23 : 1,126.41 = 387.19 : x
  2. Step 2: Convert to fraction form
    752.23/1,126.41 = 387.19/x
  3. Step 3: Cross multiply
    752.23x = 1,126.41 × 387.19
  4. Step 4: Simplify right side
    752.23x = 436,134.69
  5. Step 5: Solve for x
    x = 436,134.69/752.23
  6. Step 6: Final answer
    x = 579.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.