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Finding the Fourth Proportional to 807,609.60, 1,211,122.80 and 408,117.60

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Solution

The fourth proportional to 807,609.60, 1,211,122.80 and 408,117.60 is: 612,029.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,609.60 : 1,211,122.80 = 408,117.60 : x
  2. Step 2: Convert to fraction form
    807,609.60/1,211,122.80 = 408,117.60/x
  3. Step 3: Cross multiply
    807,609.60x = 1,211,122.80 × 408,117.60
  4. Step 4: Simplify right side
    807,609.60x = 494,280,530,441.28
  5. Step 5: Solve for x
    x = 494,280,530,441.28/807,609.60
  6. Step 6: Final answer
    x = 612,029.04

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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.