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Finding the Fourth Proportional to 757.48, 1,136.08 and 209.68

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Solution

The fourth proportional to 757.48, 1,136.08 and 209.68 is: 314.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.48 : 1,136.08 = 209.68 : x
  2. Step 2: Convert to fraction form
    757.48/1,136.08 = 209.68/x
  3. Step 3: Cross multiply
    757.48x = 1,136.08 × 209.68
  4. Step 4: Simplify right side
    757.48x = 238,213.25
  5. Step 5: Solve for x
    x = 238,213.25/757.48
  6. Step 6: Final answer
    x = 314.48

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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.