Home / 515,778,846.90-773,668,270.35-257,498,520.90

Finding the Fourth Proportional to 515,778,846.90, 773,668,270.35 and 257,498,520.90

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Solution

The fourth proportional to 515,778,846.90, 773,668,270.35 and 257,498,520.90 is: 386,247,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,778,846.90 : 773,668,270.35 = 257,498,520.90 : x
  2. Step 2: Convert to fraction form
    515,778,846.90/773,668,270.35 = 257,498,520.90/x
  3. Step 3: Cross multiply
    515,778,846.90x = 773,668,270.35 × 257,498,520.90
  4. Step 4: Simplify right side
    515,778,846.90x = 199,218,435,282,386,336
  5. Step 5: Solve for x
    x = 199,218,435,282,386,336/515,778,846.90
  6. Step 6: Final answer
    x = 386,247,781.35

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Double scale
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Similar ratio
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1.5x scale

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.