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Finding the Fourth Proportional to 751.12, 1,127.96 and 655.76

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Solution

The fourth proportional to 751.12, 1,127.96 and 655.76 is: 984.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.12 : 1,127.96 = 655.76 : x
  2. Step 2: Convert to fraction form
    751.12/1,127.96 = 655.76/x
  3. Step 3: Cross multiply
    751.12x = 1,127.96 × 655.76
  4. Step 4: Simplify right side
    751.12x = 739,671.05
  5. Step 5: Solve for x
    x = 739,671.05/751.12
  6. Step 6: Final answer
    x = 984.76

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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.