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Finding the Fourth Proportional to 936.18, 1,401.84 and 754.20

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Solution

The fourth proportional to 936.18, 1,401.84 and 754.20 is: 1,129.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.18 : 1,401.84 = 754.20 : x
  2. Step 2: Convert to fraction form
    936.18/1,401.84 = 754.20/x
  3. Step 3: Cross multiply
    936.18x = 1,401.84 × 754.20
  4. Step 4: Simplify right side
    936.18x = 1,057,267.73
  5. Step 5: Solve for x
    x = 1,057,267.73/936.18
  6. Step 6: Final answer
    x = 1,129.34

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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.