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Finding the Fourth Proportional to 757.79, 1,136.69 and 237.90

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Solution

The fourth proportional to 757.79, 1,136.69 and 237.90 is: 356.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.79 : 1,136.69 = 237.90 : x
  2. Step 2: Convert to fraction form
    757.79/1,136.69 = 237.90/x
  3. Step 3: Cross multiply
    757.79x = 1,136.69 × 237.90
  4. Step 4: Simplify right side
    757.79x = 270,417.36
  5. Step 5: Solve for x
    x = 270,417.36/757.79
  6. Step 6: Final answer
    x = 356.85

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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.