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Finding the Fourth Proportional to 807,915.20, 1,211,872.80 and 246,876.80

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Solution

The fourth proportional to 807,915.20, 1,211,872.80 and 246,876.80 is: 370,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,915.20 : 1,211,872.80 = 246,876.80 : x
  2. Step 2: Convert to fraction form
    807,915.20/1,211,872.80 = 246,876.80/x
  3. Step 3: Cross multiply
    807,915.20x = 1,211,872.80 × 246,876.80
  4. Step 4: Simplify right side
    807,915.20x = 299,183,278,871.04
  5. Step 5: Solve for x
    x = 299,183,278,871.04/807,915.20
  6. Step 6: Final answer
    x = 370,315.20

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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.