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Finding the Fourth Proportional to 235.30, 324.64 and 135.70

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Solution

The fourth proportional to 235.30, 324.64 and 135.70 is: 187.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.30 : 324.64 = 135.70 : x
  2. Step 2: Convert to fraction form
    235.30/324.64 = 135.70/x
  3. Step 3: Cross multiply
    235.30x = 324.64 × 135.70
  4. Step 4: Simplify right side
    235.30x = 44,053.65
  5. Step 5: Solve for x
    x = 44,053.65/235.30
  6. Step 6: Final answer
    x = 187.22

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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.