Home / 2,618,876.78-3,928,481.19-821,831.18

Finding the Fourth Proportional to 2,618,876.78, 3,928,481.19 and 821,831.18

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Solution

The fourth proportional to 2,618,876.78, 3,928,481.19 and 821,831.18 is: 1,232,798.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618,876.78 : 3,928,481.19 = 821,831.18 : x
  2. Step 2: Convert to fraction form
    2,618,876.78/3,928,481.19 = 821,831.18/x
  3. Step 3: Cross multiply
    2,618,876.78x = 3,928,481.19 × 821,831.18
  4. Step 4: Simplify right side
    2,618,876.78x = 3,228,548,331,985.50
  5. Step 5: Solve for x
    x = 3,228,548,331,985.50/2,618,876.78
  6. Step 6: Final answer
    x = 1,232,798.87

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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.