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Finding the Fourth Proportional to 762.26, 1,143.15 and 242.24

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Solution

The fourth proportional to 762.26, 1,143.15 and 242.24 is: 363.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.26 : 1,143.15 = 242.24 : x
  2. Step 2: Convert to fraction form
    762.26/1,143.15 = 242.24/x
  3. Step 3: Cross multiply
    762.26x = 1,143.15 × 242.24
  4. Step 4: Simplify right side
    762.26x = 276,910.94
  5. Step 5: Solve for x
    x = 276,910.94/762.26
  6. Step 6: Final answer
    x = 363.28

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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.