Home / 807,859.60-1,211,789.40-386,918.80

Finding the Fourth Proportional to 807,859.60, 1,211,789.40 and 386,918.80

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Solution

The fourth proportional to 807,859.60, 1,211,789.40 and 386,918.80 is: 580,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,859.60 : 1,211,789.40 = 386,918.80 : x
  2. Step 2: Convert to fraction form
    807,859.60/1,211,789.40 = 386,918.80/x
  3. Step 3: Cross multiply
    807,859.60x = 1,211,789.40 × 386,918.80
  4. Step 4: Simplify right side
    807,859.60x = 468,864,100,500.72
  5. Step 5: Solve for x
    x = 468,864,100,500.72/807,859.60
  6. Step 6: Final answer
    x = 580,378.20

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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.