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Finding the Fourth Proportional to 743.59, 1,115.42 and 250.03

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Solution

The fourth proportional to 743.59, 1,115.42 and 250.03 is: 375.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.59 : 1,115.42 = 250.03 : x
  2. Step 2: Convert to fraction form
    743.59/1,115.42 = 250.03/x
  3. Step 3: Cross multiply
    743.59x = 1,115.42 × 250.03
  4. Step 4: Simplify right side
    743.59x = 278,888.61
  5. Step 5: Solve for x
    x = 278,888.61/743.59
  6. Step 6: Final answer
    x = 375.06

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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.