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Finding the Fourth Proportional to 235.15, 324.53 and 136.90

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Solution

The fourth proportional to 235.15, 324.53 and 136.90 is: 188.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.15 : 324.53 = 136.90 : x
  2. Step 2: Convert to fraction form
    235.15/324.53 = 136.90/x
  3. Step 3: Cross multiply
    235.15x = 324.53 × 136.90
  4. Step 4: Simplify right side
    235.15x = 44,428.16
  5. Step 5: Solve for x
    x = 44,428.16/235.15
  6. Step 6: Final answer
    x = 188.94

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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.