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Finding the Fourth Proportional to 492,863.80, 739,295.70 and 443,000.20

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Solution

The fourth proportional to 492,863.80, 739,295.70 and 443,000.20 is: 664,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,863.80 : 739,295.70 = 443,000.20 : x
  2. Step 2: Convert to fraction form
    492,863.80/739,295.70 = 443,000.20/x
  3. Step 3: Cross multiply
    492,863.80x = 739,295.70 × 443,000.20
  4. Step 4: Simplify right side
    492,863.80x = 327,508,142,959.14
  5. Step 5: Solve for x
    x = 327,508,142,959.14/492,863.80
  6. Step 6: Final answer
    x = 664,500.30

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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.