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Finding the Fourth Proportional to 978,386.20, 1,467,579.30 and 820,922.20

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Solution

The fourth proportional to 978,386.20, 1,467,579.30 and 820,922.20 is: 1,231,383.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,386.20 : 1,467,579.30 = 820,922.20 : x
  2. Step 2: Convert to fraction form
    978,386.20/1,467,579.30 = 820,922.20/x
  3. Step 3: Cross multiply
    978,386.20x = 1,467,579.30 × 820,922.20
  4. Step 4: Simplify right side
    978,386.20x = 1,204,768,427,630.46
  5. Step 5: Solve for x
    x = 1,204,768,427,630.46/978,386.20
  6. Step 6: Final answer
    x = 1,231,383.30

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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.