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Finding the Fourth Proportional to 2,651,707.20, 3,978,079.20 and 1,053,998.40

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Solution

The fourth proportional to 2,651,707.20, 3,978,079.20 and 1,053,998.40 is: 1,581,203.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,651,707.20 : 3,978,079.20 = 1,053,998.40 : x
  2. Step 2: Convert to fraction form
    2,651,707.20/3,978,079.20 = 1,053,998.40/x
  3. Step 3: Cross multiply
    2,651,707.20x = 3,978,079.20 × 1,053,998.40
  4. Step 4: Simplify right side
    2,651,707.20x = 4,192,889,111,873.28
  5. Step 5: Solve for x
    x = 4,192,889,111,873.28/2,651,707.20
  6. Step 6: Final answer
    x = 1,581,203.65

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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.