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Finding the Fourth Proportional to 625,408.82, 863,064.92 and 338,928.90

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Solution

The fourth proportional to 625,408.82, 863,064.92 and 338,928.90 is: 467,722.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,408.82 : 863,064.92 = 338,928.90 : x
  2. Step 2: Convert to fraction form
    625,408.82/863,064.92 = 338,928.90/x
  3. Step 3: Cross multiply
    625,408.82x = 863,064.92 × 338,928.90
  4. Step 4: Simplify right side
    625,408.82x = 292,517,642,269.54
  5. Step 5: Solve for x
    x = 292,517,642,269.54/625,408.82
  6. Step 6: Final answer
    x = 467,722.29

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1.5x scale

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.