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Finding the Fourth Proportional to 981,703.20, 1,470,481.20 and 815,815.20

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Solution

The fourth proportional to 981,703.20, 1,470,481.20 and 815,815.20 is: 1,221,999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,703.20 : 1,470,481.20 = 815,815.20 : x
  2. Step 2: Convert to fraction form
    981,703.20/1,470,481.20 = 815,815.20/x
  3. Step 3: Cross multiply
    981,703.20x = 1,470,481.20 × 815,815.20
  4. Step 4: Simplify right side
    981,703.20x = 1,199,640,914,274.24
  5. Step 5: Solve for x
    x = 1,199,640,914,274.24/981,703.20
  6. Step 6: Final answer
    x = 1,221,999.60

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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.