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Finding the Fourth Proportional to 221,568.80, 331,964.40 and 181,911.20

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Solution

The fourth proportional to 221,568.80, 331,964.40 and 181,911.20 is: 272,547.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,568.80 : 331,964.40 = 181,911.20 : x
  2. Step 2: Convert to fraction form
    221,568.80/331,964.40 = 181,911.20/x
  3. Step 3: Cross multiply
    221,568.80x = 331,964.40 × 181,911.20
  4. Step 4: Simplify right side
    221,568.80x = 60,388,042,361.28
  5. Step 5: Solve for x
    x = 60,388,042,361.28/221,568.80
  6. Step 6: Final answer
    x = 272,547.59

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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.