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Finding the Fourth Proportional to 978,320.80, 1,467,481.20 and 891,229.60

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Solution

The fourth proportional to 978,320.80, 1,467,481.20 and 891,229.60 is: 1,336,844.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,320.80 : 1,467,481.20 = 891,229.60 : x
  2. Step 2: Convert to fraction form
    978,320.80/1,467,481.20 = 891,229.60/x
  3. Step 3: Cross multiply
    978,320.80x = 1,467,481.20 × 891,229.60
  4. Step 4: Simplify right side
    978,320.80x = 1,307,862,682,883.52
  5. Step 5: Solve for x
    x = 1,307,862,682,883.52/978,320.80
  6. Step 6: Final answer
    x = 1,336,844.40

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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.