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Finding the Fourth Proportional to 1,015.38, 1,517.13 and 750.71

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Solution

The fourth proportional to 1,015.38, 1,517.13 and 750.71 is: 1,121.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.38 : 1,517.13 = 750.71 : x
  2. Step 2: Convert to fraction form
    1,015.38/1,517.13 = 750.71/x
  3. Step 3: Cross multiply
    1,015.38x = 1,517.13 × 750.71
  4. Step 4: Simplify right side
    1,015.38x = 1,138,924.66
  5. Step 5: Solve for x
    x = 1,138,924.66/1,015.38
  6. Step 6: Final answer
    x = 1,121.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.