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Finding the Fourth Proportional to 635.89, 877.38 and 402.88

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Solution

The fourth proportional to 635.89, 877.38 and 402.88 is: 555.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.89 : 877.38 = 402.88 : x
  2. Step 2: Convert to fraction form
    635.89/877.38 = 402.88/x
  3. Step 3: Cross multiply
    635.89x = 877.38 × 402.88
  4. Step 4: Simplify right side
    635.89x = 353,478.85
  5. Step 5: Solve for x
    x = 353,478.85/635.89
  6. Step 6: Final answer
    x = 555.88

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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.