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Finding the Fourth Proportional to 243.64, 336.24 and 140.16

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Solution

The fourth proportional to 243.64, 336.24 and 140.16 is: 193.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.64 : 336.24 = 140.16 : x
  2. Step 2: Convert to fraction form
    243.64/336.24 = 140.16/x
  3. Step 3: Cross multiply
    243.64x = 336.24 × 140.16
  4. Step 4: Simplify right side
    243.64x = 47,127.40
  5. Step 5: Solve for x
    x = 47,127.40/243.64
  6. Step 6: Final answer
    x = 193.43

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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.