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Finding the Fourth Proportional to 485,431.60, 728,147.40 and 326,801.20

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Solution

The fourth proportional to 485,431.60, 728,147.40 and 326,801.20 is: 490,201.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,431.60 : 728,147.40 = 326,801.20 : x
  2. Step 2: Convert to fraction form
    485,431.60/728,147.40 = 326,801.20/x
  3. Step 3: Cross multiply
    485,431.60x = 728,147.40 × 326,801.20
  4. Step 4: Simplify right side
    485,431.60x = 237,959,444,096.88
  5. Step 5: Solve for x
    x = 237,959,444,096.88/485,431.60
  6. Step 6: Final answer
    x = 490,201.80

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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.