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Finding the Fourth Proportional to 620.55, 861.97 and 610.62

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Solution

The fourth proportional to 620.55, 861.97 and 610.62 is: 848.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.55 : 861.97 = 610.62 : x
  2. Step 2: Convert to fraction form
    620.55/861.97 = 610.62/x
  3. Step 3: Cross multiply
    620.55x = 861.97 × 610.62
  4. Step 4: Simplify right side
    620.55x = 526,335.99
  5. Step 5: Solve for x
    x = 526,335.99/620.55
  6. Step 6: Final answer
    x = 848.18

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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.