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Finding the Fourth Proportional to 285.88, 394.38 and 187.48

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Solution

The fourth proportional to 285.88, 394.38 and 187.48 is: 258.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.88 : 394.38 = 187.48 : x
  2. Step 2: Convert to fraction form
    285.88/394.38 = 187.48/x
  3. Step 3: Cross multiply
    285.88x = 394.38 × 187.48
  4. Step 4: Simplify right side
    285.88x = 73,938.36
  5. Step 5: Solve for x
    x = 73,938.36/285.88
  6. Step 6: Final answer
    x = 258.63

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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.