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Finding the Fourth Proportional to 431,098.80, 646,648.20 and 281,799.60

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Solution

The fourth proportional to 431,098.80, 646,648.20 and 281,799.60 is: 422,699.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,098.80 : 646,648.20 = 281,799.60 : x
  2. Step 2: Convert to fraction form
    431,098.80/646,648.20 = 281,799.60/x
  3. Step 3: Cross multiply
    431,098.80x = 646,648.20 × 281,799.60
  4. Step 4: Simplify right side
    431,098.80x = 182,225,204,100.72
  5. Step 5: Solve for x
    x = 182,225,204,100.72/431,098.80
  6. Step 6: Final answer
    x = 422,699.40

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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.