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Finding the Fourth Proportional to 918.22, 1,266.96 and 525.38

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Solution

The fourth proportional to 918.22, 1,266.96 and 525.38 is: 724.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.22 : 1,266.96 = 525.38 : x
  2. Step 2: Convert to fraction form
    918.22/1,266.96 = 525.38/x
  3. Step 3: Cross multiply
    918.22x = 1,266.96 × 525.38
  4. Step 4: Simplify right side
    918.22x = 665,635.44
  5. Step 5: Solve for x
    x = 665,635.44/918.22
  6. Step 6: Final answer
    x = 724.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.