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Finding the Fourth Proportional to 284.38, 392.45 and 167.95

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Solution

The fourth proportional to 284.38, 392.45 and 167.95 is: 231.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.38 : 392.45 = 167.95 : x
  2. Step 2: Convert to fraction form
    284.38/392.45 = 167.95/x
  3. Step 3: Cross multiply
    284.38x = 392.45 × 167.95
  4. Step 4: Simplify right side
    284.38x = 65,911.14
  5. Step 5: Solve for x
    x = 65,911.14/284.38
  6. Step 6: Final answer
    x = 231.77

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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.