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Finding the Fourth Proportional to 443,138.80, 664,708.20 and 127,627.60

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Solution

The fourth proportional to 443,138.80, 664,708.20 and 127,627.60 is: 191,441.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,138.80 : 664,708.20 = 127,627.60 : x
  2. Step 2: Convert to fraction form
    443,138.80/664,708.20 = 127,627.60/x
  3. Step 3: Cross multiply
    443,138.80x = 664,708.20 × 127,627.60
  4. Step 4: Simplify right side
    443,138.80x = 84,835,112,266.32
  5. Step 5: Solve for x
    x = 84,835,112,266.32/443,138.80
  6. Step 6: Final answer
    x = 191,441.40

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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.