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Finding the Fourth Proportional to 752.07, 1,128.11 and 570.57

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Solution

The fourth proportional to 752.07, 1,128.11 and 570.57 is: 855.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.07 : 1,128.11 = 570.57 : x
  2. Step 2: Convert to fraction form
    752.07/1,128.11 = 570.57/x
  3. Step 3: Cross multiply
    752.07x = 1,128.11 × 570.57
  4. Step 4: Simplify right side
    752.07x = 643,662.87
  5. Step 5: Solve for x
    x = 643,662.87/752.07
  6. Step 6: Final answer
    x = 855.86

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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.