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Finding the Fourth Proportional to 281,528.97, 388,548.64 and 172,614.05

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Solution

The fourth proportional to 281,528.97, 388,548.64 and 172,614.05 is: 238,231.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,528.97 : 388,548.64 = 172,614.05 : x
  2. Step 2: Convert to fraction form
    281,528.97/388,548.64 = 172,614.05/x
  3. Step 3: Cross multiply
    281,528.97x = 388,548.64 × 172,614.05
  4. Step 4: Simplify right side
    281,528.97x = 67,068,954,372.39
  5. Step 5: Solve for x
    x = 67,068,954,372.39/281,528.97
  6. Step 6: Final answer
    x = 238,231.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.