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Finding the Fourth Proportional to 240, 331.23 and 135.11

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Solution

The fourth proportional to 240, 331.23 and 135.11 is: 186.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    240 : 331.23 = 135.11 : x
  2. Step 2: Convert to fraction form
    240/331.23 = 135.11/x
  3. Step 3: Cross multiply
    240x = 331.23 × 135.11
  4. Step 4: Simplify right side
    240x = 44,750.83
  5. Step 5: Solve for x
    x = 44,750.83/240
  6. Step 6: Final answer
    x = 186.46

Related Problems

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1.5x scale

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.