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Finding the Fourth Proportional to 636.32, 877.91 and 426.47

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Solution

The fourth proportional to 636.32, 877.91 and 426.47 is: 588.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.32 : 877.91 = 426.47 : x
  2. Step 2: Convert to fraction form
    636.32/877.91 = 426.47/x
  3. Step 3: Cross multiply
    636.32x = 877.91 × 426.47
  4. Step 4: Simplify right side
    636.32x = 374,395.76
  5. Step 5: Solve for x
    x = 374,395.76/636.32
  6. Step 6: Final answer
    x = 588.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.