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Finding the Fourth Proportional to 762.58, 1,143.42 and 371.85

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Solution

The fourth proportional to 762.58, 1,143.42 and 371.85 is: 557.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.58 : 1,143.42 = 371.85 : x
  2. Step 2: Convert to fraction form
    762.58/1,143.42 = 371.85/x
  3. Step 3: Cross multiply
    762.58x = 1,143.42 × 371.85
  4. Step 4: Simplify right side
    762.58x = 425,180.73
  5. Step 5: Solve for x
    x = 425,180.73/762.58
  6. Step 6: Final answer
    x = 557.56

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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.