Home / 515,778,873.90-773,668,310.85-257,498,547.90

Finding the Fourth Proportional to 515,778,873.90, 773,668,310.85 and 257,498,547.90

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Solution

The fourth proportional to 515,778,873.90, 773,668,310.85 and 257,498,547.90 is: 386,247,821.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,778,873.90 : 773,668,310.85 = 257,498,547.90 : x
  2. Step 2: Convert to fraction form
    515,778,873.90/773,668,310.85 = 257,498,547.90/x
  3. Step 3: Cross multiply
    515,778,873.90x = 773,668,310.85 × 257,498,547.90
  4. Step 4: Simplify right side
    515,778,873.90x = 199,218,466,600,120,832
  5. Step 5: Solve for x
    x = 199,218,466,600,120,832/515,778,873.90
  6. Step 6: Final answer
    x = 386,247,821.85

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Similar ratio
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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.