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Finding the Fourth Proportional to 543,425.40, 815,138.10 and 343,096.20

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Solution

The fourth proportional to 543,425.40, 815,138.10 and 343,096.20 is: 514,644.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,425.40 : 815,138.10 = 343,096.20 : x
  2. Step 2: Convert to fraction form
    543,425.40/815,138.10 = 343,096.20/x
  3. Step 3: Cross multiply
    543,425.40x = 815,138.10 × 343,096.20
  4. Step 4: Simplify right side
    543,425.40x = 279,670,784,585.22
  5. Step 5: Solve for x
    x = 279,670,784,585.22/543,425.40
  6. Step 6: Final answer
    x = 514,644.30

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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.