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Finding the Fourth Proportional to 978,067.20, 1,465,351.20 and 838,099.20

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Solution

The fourth proportional to 978,067.20, 1,465,351.20 and 838,099.20 is: 1,255,649.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,067.20 : 1,465,351.20 = 838,099.20 : x
  2. Step 2: Convert to fraction form
    978,067.20/1,465,351.20 = 838,099.20/x
  3. Step 3: Cross multiply
    978,067.20x = 1,465,351.20 × 838,099.20
  4. Step 4: Simplify right side
    978,067.20x = 1,228,109,668,439.04
  5. Step 5: Solve for x
    x = 1,228,109,668,439.04/978,067.20
  6. Step 6: Final answer
    x = 1,255,649.58

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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.