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Finding the Fourth Proportional to 515,418.80, 773,128.20 and 263,476.40

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Solution

The fourth proportional to 515,418.80, 773,128.20 and 263,476.40 is: 395,214.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,418.80 : 773,128.20 = 263,476.40 : x
  2. Step 2: Convert to fraction form
    515,418.80/773,128.20 = 263,476.40/x
  3. Step 3: Cross multiply
    515,418.80x = 773,128.20 × 263,476.40
  4. Step 4: Simplify right side
    515,418.80x = 203,701,034,874.48
  5. Step 5: Solve for x
    x = 203,701,034,874.48/515,418.80
  6. Step 6: Final answer
    x = 395,214.60

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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.