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Finding the Fourth Proportional to 248.30, 342.60 and 143.35

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Solution

The fourth proportional to 248.30, 342.60 and 143.35 is: 197.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.30 : 342.60 = 143.35 : x
  2. Step 2: Convert to fraction form
    248.30/342.60 = 143.35/x
  3. Step 3: Cross multiply
    248.30x = 342.60 × 143.35
  4. Step 4: Simplify right side
    248.30x = 49,111.71
  5. Step 5: Solve for x
    x = 49,111.71/248.30
  6. Step 6: Final answer
    x = 197.79

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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.