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Finding the Fourth Proportional to 521,747.20, 782,620.80 and 255,370.60

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Solution

The fourth proportional to 521,747.20, 782,620.80 and 255,370.60 is: 383,055.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,747.20 : 782,620.80 = 255,370.60 : x
  2. Step 2: Convert to fraction form
    521,747.20/782,620.80 = 255,370.60/x
  3. Step 3: Cross multiply
    521,747.20x = 782,620.80 × 255,370.60
  4. Step 4: Simplify right side
    521,747.20x = 199,858,343,268.48
  5. Step 5: Solve for x
    x = 199,858,343,268.48/521,747.20
  6. Step 6: Final answer
    x = 383,055.90

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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.