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Finding the Fourth Proportional to 752.13, 1,126.57 and 477.54

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Solution

The fourth proportional to 752.13, 1,126.57 and 477.54 is: 715.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.13 : 1,126.57 = 477.54 : x
  2. Step 2: Convert to fraction form
    752.13/1,126.57 = 477.54/x
  3. Step 3: Cross multiply
    752.13x = 1,126.57 × 477.54
  4. Step 4: Simplify right side
    752.13x = 537,982.24
  5. Step 5: Solve for x
    x = 537,982.24/752.13
  6. Step 6: Final answer
    x = 715.28

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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.