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Finding the Fourth Proportional to 665,654.60, 998,568.30 and 328,867.40

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Solution

The fourth proportional to 665,654.60, 998,568.30 and 328,867.40 is: 493,343.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,654.60 : 998,568.30 = 328,867.40 : x
  2. Step 2: Convert to fraction form
    665,654.60/998,568.30 = 328,867.40/x
  3. Step 3: Cross multiply
    665,654.60x = 998,568.30 × 328,867.40
  4. Step 4: Simplify right side
    665,654.60x = 328,396,560,543.42
  5. Step 5: Solve for x
    x = 328,396,560,543.42/665,654.60
  6. Step 6: Final answer
    x = 493,343.79

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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.