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Finding the Fourth Proportional to 639.79, 884.63 and 610.22

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Solution

The fourth proportional to 639.79, 884.63 and 610.22 is: 843.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.79 : 884.63 = 610.22 : x
  2. Step 2: Convert to fraction form
    639.79/884.63 = 610.22/x
  3. Step 3: Cross multiply
    639.79x = 884.63 × 610.22
  4. Step 4: Simplify right side
    639.79x = 539,822.66
  5. Step 5: Solve for x
    x = 539,822.66/639.79
  6. Step 6: Final answer
    x = 843.75

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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.