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Finding the Fourth Proportional to 626.08, 869.80 and 620.44

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Solution

The fourth proportional to 626.08, 869.80 and 620.44 is: 861.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.08 : 869.80 = 620.44 : x
  2. Step 2: Convert to fraction form
    626.08/869.80 = 620.44/x
  3. Step 3: Cross multiply
    626.08x = 869.80 × 620.44
  4. Step 4: Simplify right side
    626.08x = 539,658.71
  5. Step 5: Solve for x
    x = 539,658.71/626.08
  6. Step 6: Final answer
    x = 861.96

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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.