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Finding the Fourth Proportional to 443,124.20, 664,232.70 and 218,138.60

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Solution

The fourth proportional to 443,124.20, 664,232.70 and 218,138.60 is: 326,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,124.20 : 664,232.70 = 218,138.60 : x
  2. Step 2: Convert to fraction form
    443,124.20/664,232.70 = 218,138.60/x
  3. Step 3: Cross multiply
    443,124.20x = 664,232.70 × 218,138.60
  4. Step 4: Simplify right side
    443,124.20x = 144,894,791,252.22
  5. Step 5: Solve for x
    x = 144,894,791,252.22/443,124.20
  6. Step 6: Final answer
    x = 326,984.60

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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.