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Finding the Fourth Proportional to 321,922.60, 482,883.90 and 85,301.80

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Solution

The fourth proportional to 321,922.60, 482,883.90 and 85,301.80 is: 127,952.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,922.60 : 482,883.90 = 85,301.80 : x
  2. Step 2: Convert to fraction form
    321,922.60/482,883.90 = 85,301.80/x
  3. Step 3: Cross multiply
    321,922.60x = 482,883.90 × 85,301.80
  4. Step 4: Simplify right side
    321,922.60x = 41,190,865,861.02
  5. Step 5: Solve for x
    x = 41,190,865,861.02/321,922.60
  6. Step 6: Final answer
    x = 127,952.70

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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.