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Finding the Fourth Proportional to 635.91, 877.99 and 426.40

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Solution

The fourth proportional to 635.91, 877.99 and 426.40 is: 588.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.91 : 877.99 = 426.40 : x
  2. Step 2: Convert to fraction form
    635.91/877.99 = 426.40/x
  3. Step 3: Cross multiply
    635.91x = 877.99 × 426.40
  4. Step 4: Simplify right side
    635.91x = 374,374.94
  5. Step 5: Solve for x
    x = 374,374.94/635.91
  6. Step 6: Final answer
    x = 588.72

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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.