Home / 861,700,977.81-1,290,992,680.85-395,752,171.41

Finding the Fourth Proportional to 861,700,977.81, 1,290,992,680.85 and 395,752,171.41

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Solution

The fourth proportional to 861,700,977.81, 1,290,992,680.85 and 395,752,171.41 is: 592,912,355.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,700,977.81 : 1,290,992,680.85 = 395,752,171.41 : x
  2. Step 2: Convert to fraction form
    861,700,977.81/1,290,992,680.85 = 395,752,171.41/x
  3. Step 3: Cross multiply
    861,700,977.81x = 1,290,992,680.85 × 395,752,171.41
  4. Step 4: Simplify right side
    861,700,977.81x = 510,913,156,718,825,920
  5. Step 5: Solve for x
    x = 510,913,156,718,825,920/861,700,977.81
  6. Step 6: Final answer
    x = 592,912,355.77

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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.