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Finding the Fourth Proportional to 285,574.72, 394,103.28 and 172,375.36

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Solution

The fourth proportional to 285,574.72, 394,103.28 and 172,375.36 is: 237,884.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,574.72 : 394,103.28 = 172,375.36 : x
  2. Step 2: Convert to fraction form
    285,574.72/394,103.28 = 172,375.36/x
  3. Step 3: Cross multiply
    285,574.72x = 394,103.28 × 172,375.36
  4. Step 4: Simplify right side
    285,574.72x = 67,933,694,767.18
  5. Step 5: Solve for x
    x = 67,933,694,767.18/285,574.72
  6. Step 6: Final answer
    x = 237,884.13

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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.