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Finding the Fourth Proportional to 635.72, 881.75 and 609.80

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Solution

The fourth proportional to 635.72, 881.75 and 609.80 is: 845.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.72 : 881.75 = 609.80 : x
  2. Step 2: Convert to fraction form
    635.72/881.75 = 609.80/x
  3. Step 3: Cross multiply
    635.72x = 881.75 × 609.80
  4. Step 4: Simplify right side
    635.72x = 537,691.15
  5. Step 5: Solve for x
    x = 537,691.15/635.72
  6. Step 6: Final answer
    x = 845.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.