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Finding the Fourth Proportional to 515,816.10, 773,724.15 and 326,859.30

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Solution

The fourth proportional to 515,816.10, 773,724.15 and 326,859.30 is: 490,288.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,816.10 : 773,724.15 = 326,859.30 : x
  2. Step 2: Convert to fraction form
    515,816.10/773,724.15 = 326,859.30/x
  3. Step 3: Cross multiply
    515,816.10x = 773,724.15 × 326,859.30
  4. Step 4: Simplify right side
    515,816.10x = 252,898,934,062.10
  5. Step 5: Solve for x
    x = 252,898,934,062.10/515,816.10
  6. Step 6: Final answer
    x = 490,288.95

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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.