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Finding the Fourth Proportional to 284.38, 392.57 and 191.18

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Solution

The fourth proportional to 284.38, 392.57 and 191.18 is: 263.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.38 : 392.57 = 191.18 : x
  2. Step 2: Convert to fraction form
    284.38/392.57 = 191.18/x
  3. Step 3: Cross multiply
    284.38x = 392.57 × 191.18
  4. Step 4: Simplify right side
    284.38x = 75,052.28
  5. Step 5: Solve for x
    x = 75,052.28/284.38
  6. Step 6: Final answer
    x = 263.92

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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.