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Finding the Fourth Proportional to 321,933.60, 482,900.40 and 85,312.80

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Solution

The fourth proportional to 321,933.60, 482,900.40 and 85,312.80 is: 127,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,933.60 : 482,900.40 = 85,312.80 : x
  2. Step 2: Convert to fraction form
    321,933.60/482,900.40 = 85,312.80/x
  3. Step 3: Cross multiply
    321,933.60x = 482,900.40 × 85,312.80
  4. Step 4: Simplify right side
    321,933.60x = 41,197,585,245.12
  5. Step 5: Solve for x
    x = 41,197,585,245.12/321,933.60
  6. Step 6: Final answer
    x = 127,969.20

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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.