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Finding the Fourth Proportional to 285.63, 394.91 and 248.74

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Solution

The fourth proportional to 285.63, 394.91 and 248.74 is: 343.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.63 : 394.91 = 248.74 : x
  2. Step 2: Convert to fraction form
    285.63/394.91 = 248.74/x
  3. Step 3: Cross multiply
    285.63x = 394.91 × 248.74
  4. Step 4: Simplify right side
    285.63x = 98,228.62
  5. Step 5: Solve for x
    x = 98,228.62/285.63
  6. Step 6: Final answer
    x = 343.91

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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.