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Finding the Fourth Proportional to 515,820.60, 773,730.90 and 326,863.80

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Solution

The fourth proportional to 515,820.60, 773,730.90 and 326,863.80 is: 490,295.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,820.60 : 773,730.90 = 326,863.80 : x
  2. Step 2: Convert to fraction form
    515,820.60/773,730.90 = 326,863.80/x
  3. Step 3: Cross multiply
    515,820.60x = 773,730.90 × 326,863.80
  4. Step 4: Simplify right side
    515,820.60x = 252,904,622,151.42
  5. Step 5: Solve for x
    x = 252,904,622,151.42/515,820.60
  6. Step 6: Final answer
    x = 490,295.70

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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.