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Finding the Fourth Proportional to 543,619.20, 815,428.80 and 341,540.40

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Solution

The fourth proportional to 543,619.20, 815,428.80 and 341,540.40 is: 512,310.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,619.20 : 815,428.80 = 341,540.40 : x
  2. Step 2: Convert to fraction form
    543,619.20/815,428.80 = 341,540.40/x
  3. Step 3: Cross multiply
    543,619.20x = 815,428.80 × 341,540.40
  4. Step 4: Simplify right side
    543,619.20x = 278,501,878,523.52
  5. Step 5: Solve for x
    x = 278,501,878,523.52/543,619.20
  6. Step 6: Final answer
    x = 512,310.60

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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.