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Finding the Fourth Proportional to 918.53, 1,267.39 and 525.47

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Solution

The fourth proportional to 918.53, 1,267.39 and 525.47 is: 725.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.53 : 1,267.39 = 525.47 : x
  2. Step 2: Convert to fraction form
    918.53/1,267.39 = 525.47/x
  3. Step 3: Cross multiply
    918.53x = 1,267.39 × 525.47
  4. Step 4: Simplify right side
    918.53x = 665,975.42
  5. Step 5: Solve for x
    x = 665,975.42/918.53
  6. Step 6: Final answer
    x = 725.04

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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.