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Finding the Fourth Proportional to 701.25, 1,050.50 and 515.81

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Solution

The fourth proportional to 701.25, 1,050.50 and 515.81 is: 772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.25 : 1,050.50 = 515.81 : x
  2. Step 2: Convert to fraction form
    701.25/1,050.50 = 515.81/x
  3. Step 3: Cross multiply
    701.25x = 1,050.50 × 515.81
  4. Step 4: Simplify right side
    701.25x = 541,862.32
  5. Step 5: Solve for x
    x = 541,862.32/701.25
  6. Step 6: Final answer
    x = 772.71

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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.