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Finding the Fourth Proportional to 543,126.20, 814,689.30 and 342,359.60

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Solution

The fourth proportional to 543,126.20, 814,689.30 and 342,359.60 is: 513,539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,126.20 : 814,689.30 = 342,359.60 : x
  2. Step 2: Convert to fraction form
    543,126.20/814,689.30 = 342,359.60/x
  3. Step 3: Cross multiply
    543,126.20x = 814,689.30 × 342,359.60
  4. Step 4: Simplify right side
    543,126.20x = 278,916,702,872.28
  5. Step 5: Solve for x
    x = 278,916,702,872.28/543,126.20
  6. Step 6: Final answer
    x = 513,539.40

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Double scale
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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.