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Finding the Fourth Proportional to 752.01, 1,037.78 and 489.57

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Solution

The fourth proportional to 752.01, 1,037.78 and 489.57 is: 675.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.01 : 1,037.78 = 489.57 : x
  2. Step 2: Convert to fraction form
    752.01/1,037.78 = 489.57/x
  3. Step 3: Cross multiply
    752.01x = 1,037.78 × 489.57
  4. Step 4: Simplify right side
    752.01x = 508,065.95
  5. Step 5: Solve for x
    x = 508,065.95/752.01
  6. Step 6: Final answer
    x = 675.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.