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Finding the Fourth Proportional to 2,618,894.52, 3,928,507.80 and 821,848.84

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Solution

The fourth proportional to 2,618,894.52, 3,928,507.80 and 821,848.84 is: 1,232,825.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618,894.52 : 3,928,507.80 = 821,848.84 : x
  2. Step 2: Convert to fraction form
    2,618,894.52/3,928,507.80 = 821,848.84/x
  3. Step 3: Cross multiply
    2,618,894.52x = 3,928,507.80 × 821,848.84
  4. Step 4: Simplify right side
    2,618,894.52x = 3,228,639,578,360.95
  5. Step 5: Solve for x
    x = 3,228,639,578,360.95/2,618,894.52
  6. Step 6: Final answer
    x = 1,232,825.36

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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.