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Finding the Fourth Proportional to 998,998.80, 1,498,498.20 and 992,000.40

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Solution

The fourth proportional to 998,998.80, 1,498,498.20 and 992,000.40 is: 1,488,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,998.80 : 1,498,498.20 = 992,000.40 : x
  2. Step 2: Convert to fraction form
    998,998.80/1,498,498.20 = 992,000.40/x
  3. Step 3: Cross multiply
    998,998.80x = 1,498,498.20 × 992,000.40
  4. Step 4: Simplify right side
    998,998.80x = 1,486,510,813,799.28
  5. Step 5: Solve for x
    x = 1,486,510,813,799.28/998,998.80
  6. Step 6: Final answer
    x = 1,488,000.60

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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.