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Finding the Fourth Proportional to 248.32, 342.55 and 165.43

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Solution

The fourth proportional to 248.32, 342.55 and 165.43 is: 228.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.32 : 342.55 = 165.43 : x
  2. Step 2: Convert to fraction form
    248.32/342.55 = 165.43/x
  3. Step 3: Cross multiply
    248.32x = 342.55 × 165.43
  4. Step 4: Simplify right side
    248.32x = 56,668.67
  5. Step 5: Solve for x
    x = 56,668.67/248.32
  6. Step 6: Final answer
    x = 228.21

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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.