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Finding the Fourth Proportional to 285.39, 394.88 and 248.67

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Solution

The fourth proportional to 285.39, 394.88 and 248.67 is: 344.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.39 : 394.88 = 248.67 : x
  2. Step 2: Convert to fraction form
    285.39/394.88 = 248.67/x
  3. Step 3: Cross multiply
    285.39x = 394.88 × 248.67
  4. Step 4: Simplify right side
    285.39x = 98,193.57
  5. Step 5: Solve for x
    x = 98,193.57/285.39
  6. Step 6: Final answer
    x = 344.07

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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.