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Finding the Fourth Proportional to 750.41, 1,125.31 and 311.36

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Solution

The fourth proportional to 750.41, 1,125.31 and 311.36 is: 466.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.41 : 1,125.31 = 311.36 : x
  2. Step 2: Convert to fraction form
    750.41/1,125.31 = 311.36/x
  3. Step 3: Cross multiply
    750.41x = 1,125.31 × 311.36
  4. Step 4: Simplify right side
    750.41x = 350,373.43
  5. Step 5: Solve for x
    x = 350,373.43/750.41
  6. Step 6: Final answer
    x = 466.91

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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.