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Finding the Fourth Proportional to 750.96, 1,126.56 and 426.24

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Solution

The fourth proportional to 750.96, 1,126.56 and 426.24 is: 639.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.96 : 1,126.56 = 426.24 : x
  2. Step 2: Convert to fraction form
    750.96/1,126.56 = 426.24/x
  3. Step 3: Cross multiply
    750.96x = 1,126.56 × 426.24
  4. Step 4: Simplify right side
    750.96x = 480,184.93
  5. Step 5: Solve for x
    x = 480,184.93/750.96
  6. Step 6: Final answer
    x = 639.43

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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.