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Finding the Fourth Proportional to 284.18, 391.98 and 179.28

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Solution

The fourth proportional to 284.18, 391.98 and 179.28 is: 247.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.18 : 391.98 = 179.28 : x
  2. Step 2: Convert to fraction form
    284.18/391.98 = 179.28/x
  3. Step 3: Cross multiply
    284.18x = 391.98 × 179.28
  4. Step 4: Simplify right side
    284.18x = 70,274.17
  5. Step 5: Solve for x
    x = 70,274.17/284.18
  6. Step 6: Final answer
    x = 247.29

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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.