Home / 515,778,858.90-773,668,288.35-257,498,532.90

Finding the Fourth Proportional to 515,778,858.90, 773,668,288.35 and 257,498,532.90

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Solution

The fourth proportional to 515,778,858.90, 773,668,288.35 and 257,498,532.90 is: 386,247,799.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,778,858.90 : 773,668,288.35 = 257,498,532.90 : x
  2. Step 2: Convert to fraction form
    515,778,858.90/773,668,288.35 = 257,498,532.90/x
  3. Step 3: Cross multiply
    515,778,858.90x = 773,668,288.35 × 257,498,532.90
  4. Step 4: Simplify right side
    515,778,858.90x = 199,218,449,201,379,168
  5. Step 5: Solve for x
    x = 199,218,449,201,379,168/515,778,858.90
  6. Step 6: Final answer
    x = 386,247,799.35

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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.