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Finding the Fourth Proportional to 243.84, 336.56 and 155.32

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Solution

The fourth proportional to 243.84, 336.56 and 155.32 is: 214.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.84 : 336.56 = 155.32 : x
  2. Step 2: Convert to fraction form
    243.84/336.56 = 155.32/x
  3. Step 3: Cross multiply
    243.84x = 336.56 × 155.32
  4. Step 4: Simplify right side
    243.84x = 52,274.50
  5. Step 5: Solve for x
    x = 52,274.50/243.84
  6. Step 6: Final answer
    x = 214.38

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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.