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Finding the Fourth Proportional to 485,751.60, 728,627.40 and 327,121.20

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Solution

The fourth proportional to 485,751.60, 728,627.40 and 327,121.20 is: 490,681.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,751.60 : 728,627.40 = 327,121.20 : x
  2. Step 2: Convert to fraction form
    485,751.60/728,627.40 = 327,121.20/x
  3. Step 3: Cross multiply
    485,751.60x = 728,627.40 × 327,121.20
  4. Step 4: Simplify right side
    485,751.60x = 238,349,469,440.88
  5. Step 5: Solve for x
    x = 238,349,469,440.88/485,751.60
  6. Step 6: Final answer
    x = 490,681.80

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Similar ratio
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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.