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Finding the Fourth Proportional to 515,422.80, 773,134.20 and 263,480.40

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Solution

The fourth proportional to 515,422.80, 773,134.20 and 263,480.40 is: 395,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,422.80 : 773,134.20 = 263,480.40 : x
  2. Step 2: Convert to fraction form
    515,422.80/773,134.20 = 263,480.40/x
  3. Step 3: Cross multiply
    515,422.80x = 773,134.20 × 263,480.40
  4. Step 4: Simplify right side
    515,422.80x = 203,705,708,269.68
  5. Step 5: Solve for x
    x = 203,705,708,269.68/515,422.80
  6. Step 6: Final answer
    x = 395,220.60

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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.