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Finding the Fourth Proportional to 243.85, 336.45 and 155.29

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Solution

The fourth proportional to 243.85, 336.45 and 155.29 is: 214.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.85 : 336.45 = 155.29 : x
  2. Step 2: Convert to fraction form
    243.85/336.45 = 155.29/x
  3. Step 3: Cross multiply
    243.85x = 336.45 × 155.29
  4. Step 4: Simplify right side
    243.85x = 52,247.32
  5. Step 5: Solve for x
    x = 52,247.32/243.85
  6. Step 6: Final answer
    x = 214.26

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.