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Finding the Fourth Proportional to 543,190.20, 814,785.30 and 342,423.60

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Solution

The fourth proportional to 543,190.20, 814,785.30 and 342,423.60 is: 513,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,190.20 : 814,785.30 = 342,423.60 : x
  2. Step 2: Convert to fraction form
    543,190.20/814,785.30 = 342,423.60/x
  3. Step 3: Cross multiply
    543,190.20x = 814,785.30 × 342,423.60
  4. Step 4: Simplify right side
    543,190.20x = 279,001,715,653.08
  5. Step 5: Solve for x
    x = 279,001,715,653.08/543,190.20
  6. Step 6: Final answer
    x = 513,635.40

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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.