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Finding the Fourth Proportional to 751.35, 1,126.27 and 426.04

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Solution

The fourth proportional to 751.35, 1,126.27 and 426.04 is: 638.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.35 : 1,126.27 = 426.04 : x
  2. Step 2: Convert to fraction form
    751.35/1,126.27 = 426.04/x
  3. Step 3: Cross multiply
    751.35x = 1,126.27 × 426.04
  4. Step 4: Simplify right side
    751.35x = 479,836.07
  5. Step 5: Solve for x
    x = 479,836.07/751.35
  6. Step 6: Final answer
    x = 638.63

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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.