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Finding the Fourth Proportional to 918.01, 1,266.87 and 525.04

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Solution

The fourth proportional to 918.01, 1,266.87 and 525.04 is: 724.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.01 : 1,266.87 = 525.04 : x
  2. Step 2: Convert to fraction form
    918.01/1,266.87 = 525.04/x
  3. Step 3: Cross multiply
    918.01x = 1,266.87 × 525.04
  4. Step 4: Simplify right side
    918.01x = 665,157.42
  5. Step 5: Solve for x
    x = 665,157.42/918.01
  6. Step 6: Final answer
    x = 724.56

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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.