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Finding the Fourth Proportional to 543,759.20, 815,638.80 and 342,992.60

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Solution

The fourth proportional to 543,759.20, 815,638.80 and 342,992.60 is: 514,488.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,759.20 : 815,638.80 = 342,992.60 : x
  2. Step 2: Convert to fraction form
    543,759.20/815,638.80 = 342,992.60/x
  3. Step 3: Cross multiply
    543,759.20x = 815,638.80 × 342,992.60
  4. Step 4: Simplify right side
    543,759.20x = 279,758,072,672.88
  5. Step 5: Solve for x
    x = 279,758,072,672.88/543,759.20
  6. Step 6: Final answer
    x = 514,488.90

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Similar ratio
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1.5x scale

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.