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Finding the Fourth Proportional to 265,885.20, 398,711.04 and 99,556.56

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Solution

The fourth proportional to 265,885.20, 398,711.04 and 99,556.56 is: 149,291.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,885.20 : 398,711.04 = 99,556.56 : x
  2. Step 2: Convert to fraction form
    265,885.20/398,711.04 = 99,556.56/x
  3. Step 3: Cross multiply
    265,885.20x = 398,711.04 × 99,556.56
  4. Step 4: Simplify right side
    265,885.20x = 39,694,299,576.42
  5. Step 5: Solve for x
    x = 39,694,299,576.42/265,885.20
  6. Step 6: Final answer
    x = 149,291.12

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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.