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Finding the Fourth Proportional to 751.07, 1,126.59 and 426.46

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Solution

The fourth proportional to 751.07, 1,126.59 and 426.46 is: 639.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.07 : 1,126.59 = 426.46 : x
  2. Step 2: Convert to fraction form
    751.07/1,126.59 = 426.46/x
  3. Step 3: Cross multiply
    751.07x = 1,126.59 × 426.46
  4. Step 4: Simplify right side
    751.07x = 480,445.57
  5. Step 5: Solve for x
    x = 480,445.57/751.07
  6. Step 6: Final answer
    x = 639.68

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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.