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Finding the Fourth Proportional to 321,867.10, 482,800.65 and 85,233.70

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Solution

The fourth proportional to 321,867.10, 482,800.65 and 85,233.70 is: 127,850.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,867.10 : 482,800.65 = 85,233.70 : x
  2. Step 2: Convert to fraction form
    321,867.10/482,800.65 = 85,233.70/x
  3. Step 3: Cross multiply
    321,867.10x = 482,800.65 × 85,233.70
  4. Step 4: Simplify right side
    321,867.10x = 41,150,885,761.91
  5. Step 5: Solve for x
    x = 41,150,885,761.91/321,867.10
  6. Step 6: Final answer
    x = 127,850.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.