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Finding the Fourth Proportional to 394,894,701.20, 592,342,051.80 and 280,103,445.20

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Solution

The fourth proportional to 394,894,701.20, 592,342,051.80 and 280,103,445.20 is: 420,155,167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,894,701.20 : 592,342,051.80 = 280,103,445.20 : x
  2. Step 2: Convert to fraction form
    394,894,701.20/592,342,051.80 = 280,103,445.20/x
  3. Step 3: Cross multiply
    394,894,701.20x = 592,342,051.80 × 280,103,445.20
  4. Step 4: Simplify right side
    394,894,701.20x = 165,917,049,446,016,832
  5. Step 5: Solve for x
    x = 165,917,049,446,016,832/394,894,701.20
  6. Step 6: Final answer
    x = 420,155,167.80

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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.