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Finding the Fourth Proportional to 2,618,876.93, 3,928,481.46 and 821,831.31

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Solution

The fourth proportional to 2,618,876.93, 3,928,481.46 and 821,831.31 is: 1,232,799.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618,876.93 : 3,928,481.46 = 821,831.31 : x
  2. Step 2: Convert to fraction form
    2,618,876.93/3,928,481.46 = 821,831.31/x
  3. Step 3: Cross multiply
    2,618,876.93x = 3,928,481.46 × 821,831.31
  4. Step 4: Simplify right side
    2,618,876.93x = 3,228,549,064,582.51
  5. Step 5: Solve for x
    x = 3,228,549,064,582.51/2,618,876.93
  6. Step 6: Final answer
    x = 1,232,799.08

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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.