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Finding the Fourth Proportional to 265,889.20, 398,717.04 and 99,560.56

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Solution

The fourth proportional to 265,889.20, 398,717.04 and 99,560.56 is: 149,297.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,889.20 : 398,717.04 = 99,560.56 : x
  2. Step 2: Convert to fraction form
    265,889.20/398,717.04 = 99,560.56/x
  3. Step 3: Cross multiply
    265,889.20x = 398,717.04 × 99,560.56
  4. Step 4: Simplify right side
    265,889.20x = 39,696,491,783.94
  5. Step 5: Solve for x
    x = 39,696,491,783.94/265,889.20
  6. Step 6: Final answer
    x = 149,297.12

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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.