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Finding the Fourth Proportional to 248.78, 370.58 and 239.87

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Solution

The fourth proportional to 248.78, 370.58 and 239.87 is: 357.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.78 : 370.58 = 239.87 : x
  2. Step 2: Convert to fraction form
    248.78/370.58 = 239.87/x
  3. Step 3: Cross multiply
    248.78x = 370.58 × 239.87
  4. Step 4: Simplify right side
    248.78x = 88,891.02
  5. Step 5: Solve for x
    x = 88,891.02/248.78
  6. Step 6: Final answer
    x = 357.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.