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Finding the Fourth Proportional to 1,093,869.20, 1,640,803.80 and 813,933.20

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Solution

The fourth proportional to 1,093,869.20, 1,640,803.80 and 813,933.20 is: 1,220,899.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093,869.20 : 1,640,803.80 = 813,933.20 : x
  2. Step 2: Convert to fraction form
    1,093,869.20/1,640,803.80 = 813,933.20/x
  3. Step 3: Cross multiply
    1,093,869.20x = 1,640,803.80 × 813,933.20
  4. Step 4: Simplify right side
    1,093,869.20x = 1,335,504,687,506.16
  5. Step 5: Solve for x
    x = 1,335,504,687,506.16/1,093,869.20
  6. Step 6: Final answer
    x = 1,220,899.80

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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.