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Finding the Fourth Proportional to 762.92, 1,137.28 and 754.28

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Solution

The fourth proportional to 762.92, 1,137.28 and 754.28 is: 1,124.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.92 : 1,137.28 = 754.28 : x
  2. Step 2: Convert to fraction form
    762.92/1,137.28 = 754.28/x
  3. Step 3: Cross multiply
    762.92x = 1,137.28 × 754.28
  4. Step 4: Simplify right side
    762.92x = 857,827.56
  5. Step 5: Solve for x
    x = 857,827.56/762.92
  6. Step 6: Final answer
    x = 1,124.40

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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.