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Finding the Fourth Proportional to 308,357.42, 425,542.61 and 172,397.09

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Solution

The fourth proportional to 308,357.42, 425,542.61 and 172,397.09 is: 237,913.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,357.42 : 425,542.61 = 172,397.09 : x
  2. Step 2: Convert to fraction form
    308,357.42/425,542.61 = 172,397.09/x
  3. Step 3: Cross multiply
    308,357.42x = 425,542.61 × 172,397.09
  4. Step 4: Simplify right side
    308,357.42x = 73,362,304,645.31
  5. Step 5: Solve for x
    x = 73,362,304,645.31/308,357.42
  6. Step 6: Final answer
    x = 237,913.22

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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.