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Finding the Fourth Proportional to 284.44, 391.80 and 247.36

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Solution

The fourth proportional to 284.44, 391.80 and 247.36 is: 340.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.44 : 391.80 = 247.36 : x
  2. Step 2: Convert to fraction form
    284.44/391.80 = 247.36/x
  3. Step 3: Cross multiply
    284.44x = 391.80 × 247.36
  4. Step 4: Simplify right side
    284.44x = 96,915.65
  5. Step 5: Solve for x
    x = 96,915.65/284.44
  6. Step 6: Final answer
    x = 340.72

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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.