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Finding the Fourth Proportional to 751.92, 1,126.76 and 615.92

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Solution

The fourth proportional to 751.92, 1,126.76 and 615.92 is: 922.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.92 : 1,126.76 = 615.92 : x
  2. Step 2: Convert to fraction form
    751.92/1,126.76 = 615.92/x
  3. Step 3: Cross multiply
    751.92x = 1,126.76 × 615.92
  4. Step 4: Simplify right side
    751.92x = 693,994.02
  5. Step 5: Solve for x
    x = 693,994.02/751.92
  6. Step 6: Final answer
    x = 922.96

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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.