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Finding the Fourth Proportional to 918.01, 1,371.05 and 753.85

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Solution

The fourth proportional to 918.01, 1,371.05 and 753.85 is: 1,125.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.01 : 1,371.05 = 753.85 : x
  2. Step 2: Convert to fraction form
    918.01/1,371.05 = 753.85/x
  3. Step 3: Cross multiply
    918.01x = 1,371.05 × 753.85
  4. Step 4: Simplify right side
    918.01x = 1,033,566.04
  5. Step 5: Solve for x
    x = 1,033,566.04/918.01
  6. Step 6: Final answer
    x = 1,125.88

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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.