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Finding the Fourth Proportional to 839,646.80, 1,259,470.20 and 806,987.60

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Solution

The fourth proportional to 839,646.80, 1,259,470.20 and 806,987.60 is: 1,210,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,646.80 : 1,259,470.20 = 806,987.60 : x
  2. Step 2: Convert to fraction form
    839,646.80/1,259,470.20 = 806,987.60/x
  3. Step 3: Cross multiply
    839,646.80x = 1,259,470.20 × 806,987.60
  4. Step 4: Simplify right side
    839,646.80x = 1,016,376,833,969.52
  5. Step 5: Solve for x
    x = 1,016,376,833,969.52/839,646.80
  6. Step 6: Final answer
    x = 1,210,481.40

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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.