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Finding the Fourth Proportional to 543,815.20, 815,722.80 and 343,048.60

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Solution

The fourth proportional to 543,815.20, 815,722.80 and 343,048.60 is: 514,572.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,815.20 : 815,722.80 = 343,048.60 : x
  2. Step 2: Convert to fraction form
    543,815.20/815,722.80 = 343,048.60/x
  3. Step 3: Cross multiply
    543,815.20x = 815,722.80 × 343,048.60
  4. Step 4: Simplify right side
    543,815.20x = 279,832,564,528.08
  5. Step 5: Solve for x
    x = 279,832,564,528.08/543,815.20
  6. Step 6: Final answer
    x = 514,572.90

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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.