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Finding the Fourth Proportional to 284.13, 391.65 and 239.94

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Solution

The fourth proportional to 284.13, 391.65 and 239.94 is: 330.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.13 : 391.65 = 239.94 : x
  2. Step 2: Convert to fraction form
    284.13/391.65 = 239.94/x
  3. Step 3: Cross multiply
    284.13x = 391.65 × 239.94
  4. Step 4: Simplify right side
    284.13x = 93,972.50
  5. Step 5: Solve for x
    x = 93,972.50/284.13
  6. Step 6: Final answer
    x = 330.74

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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.