Home / 515,778,876.40-773,668,314.60-257,498,550.40

Finding the Fourth Proportional to 515,778,876.40, 773,668,314.60 and 257,498,550.40

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Solution

The fourth proportional to 515,778,876.40, 773,668,314.60 and 257,498,550.40 is: 386,247,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,778,876.40 : 773,668,314.60 = 257,498,550.40 : x
  2. Step 2: Convert to fraction form
    515,778,876.40/773,668,314.60 = 257,498,550.40/x
  3. Step 3: Cross multiply
    515,778,876.40x = 773,668,314.60 × 257,498,550.40
  4. Step 4: Simplify right side
    515,778,876.40x = 199,218,469,499,911,168
  5. Step 5: Solve for x
    x = 199,218,469,499,911,168/515,778,876.40
  6. Step 6: Final answer
    x = 386,247,825.60

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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.