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Finding the Fourth Proportional to 995,346.80, 1,493,020.20 and 321,426.80

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Solution

The fourth proportional to 995,346.80, 1,493,020.20 and 321,426.80 is: 482,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    995,346.80 : 1,493,020.20 = 321,426.80 : x
  2. Step 2: Convert to fraction form
    995,346.80/1,493,020.20 = 321,426.80/x
  3. Step 3: Cross multiply
    995,346.80x = 1,493,020.20 × 321,426.80
  4. Step 4: Simplify right side
    995,346.80x = 479,896,705,221.36
  5. Step 5: Solve for x
    x = 479,896,705,221.36/995,346.80
  6. Step 6: Final answer
    x = 482,140.20

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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.