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Finding the Fourth Proportional to 443,139.40, 664,709.10 and 398,902.60

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Solution

The fourth proportional to 443,139.40, 664,709.10 and 398,902.60 is: 598,353.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,139.40 : 664,709.10 = 398,902.60 : x
  2. Step 2: Convert to fraction form
    443,139.40/664,709.10 = 398,902.60/x
  3. Step 3: Cross multiply
    443,139.40x = 664,709.10 × 398,902.60
  4. Step 4: Simplify right side
    443,139.40x = 265,154,188,233.66
  5. Step 5: Solve for x
    x = 265,154,188,233.66/443,139.40
  6. Step 6: Final answer
    x = 598,353.90

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Double scale
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Similar ratio
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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.