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Finding the Fourth Proportional to 813,793.80, 1,221,273.90 and 340,818.60

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Solution

The fourth proportional to 813,793.80, 1,221,273.90 and 340,818.60 is: 511,472.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,793.80 : 1,221,273.90 = 340,818.60 : x
  2. Step 2: Convert to fraction form
    813,793.80/1,221,273.90 = 340,818.60/x
  3. Step 3: Cross multiply
    813,793.80x = 1,221,273.90 × 340,818.60
  4. Step 4: Simplify right side
    813,793.80x = 416,232,860,814.54
  5. Step 5: Solve for x
    x = 416,232,860,814.54/813,793.80
  6. Step 6: Final answer
    x = 511,472.15

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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.