Home / 515,778,859.40-773,668,289.10-257,498,533.40

Finding the Fourth Proportional to 515,778,859.40, 773,668,289.10 and 257,498,533.40

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Solution

The fourth proportional to 515,778,859.40, 773,668,289.10 and 257,498,533.40 is: 386,247,800.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,778,859.40 : 773,668,289.10 = 257,498,533.40 : x
  2. Step 2: Convert to fraction form
    515,778,859.40/773,668,289.10 = 257,498,533.40/x
  3. Step 3: Cross multiply
    515,778,859.40x = 773,668,289.10 × 257,498,533.40
  4. Step 4: Simplify right side
    515,778,859.40x = 199,218,449,781,337,216
  5. Step 5: Solve for x
    x = 199,218,449,781,337,216/515,778,859.40
  6. Step 6: Final answer
    x = 386,247,800.10

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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.