Home / 813,218.40-1,121,578.56-572,299.20

Finding the Fourth Proportional to 813,218.40, 1,121,578.56 and 572,299.20

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Solution

The fourth proportional to 813,218.40, 1,121,578.56 and 572,299.20 is: 789,306.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,218.40 : 1,121,578.56 = 572,299.20 : x
  2. Step 2: Convert to fraction form
    813,218.40/1,121,578.56 = 572,299.20/x
  3. Step 3: Cross multiply
    813,218.40x = 1,121,578.56 × 572,299.20
  4. Step 4: Simplify right side
    813,218.40x = 641,878,512,625.15
  5. Step 5: Solve for x
    x = 641,878,512,625.15/813,218.40
  6. Step 6: Final answer
    x = 789,306.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.