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Finding the Fourth Proportional to 284.68, 392.70 and 181

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Solution

The fourth proportional to 284.68, 392.70 and 181 is: 249.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.68 : 392.70 = 181 : x
  2. Step 2: Convert to fraction form
    284.68/392.70 = 181/x
  3. Step 3: Cross multiply
    284.68x = 392.70 × 181
  4. Step 4: Simplify right side
    284.68x = 71,078.70
  5. Step 5: Solve for x
    x = 71,078.70/284.68
  6. Step 6: Final answer
    x = 249.68

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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.