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Finding the Fourth Proportional to 762.50, 1,136.17 and 680.75

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Solution

The fourth proportional to 762.50, 1,136.17 and 680.75 is: 1,014.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.50 : 1,136.17 = 680.75 : x
  2. Step 2: Convert to fraction form
    762.50/1,136.17 = 680.75/x
  3. Step 3: Cross multiply
    762.50x = 1,136.17 × 680.75
  4. Step 4: Simplify right side
    762.50x = 773,447.73
  5. Step 5: Solve for x
    x = 773,447.73/762.50
  6. Step 6: Final answer
    x = 1,014.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.