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Finding the Fourth Proportional to 762.60, 1,136.97 and 743.64

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Solution

The fourth proportional to 762.60, 1,136.97 and 743.64 is: 1,108.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.60 : 1,136.97 = 743.64 : x
  2. Step 2: Convert to fraction form
    762.60/1,136.97 = 743.64/x
  3. Step 3: Cross multiply
    762.60x = 1,136.97 × 743.64
  4. Step 4: Simplify right side
    762.60x = 845,496.37
  5. Step 5: Solve for x
    x = 845,496.37/762.60
  6. Step 6: Final answer
    x = 1,108.70

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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.