Home / 442,659,287.20-663,988,930.80-289,776,906.40

Finding the Fourth Proportional to 442,659,287.20, 663,988,930.80 and 289,776,906.40

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Solution

The fourth proportional to 442,659,287.20, 663,988,930.80 and 289,776,906.40 is: 434,665,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,659,287.20 : 663,988,930.80 = 289,776,906.40 : x
  2. Step 2: Convert to fraction form
    442,659,287.20/663,988,930.80 = 289,776,906.40/x
  3. Step 3: Cross multiply
    442,659,287.20x = 663,988,930.80 × 289,776,906.40
  4. Step 4: Simplify right side
    442,659,287.20x = 192,408,658,251,067,648
  5. Step 5: Solve for x
    x = 192,408,658,251,067,648/442,659,287.20
  6. Step 6: Final answer
    x = 434,665,359.60

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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.