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Finding the Fourth Proportional to 233.40, 349.92 and 89.16

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Solution

The fourth proportional to 233.40, 349.92 and 89.16 is: 133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.40 : 349.92 = 89.16 : x
  2. Step 2: Convert to fraction form
    233.40/349.92 = 89.16/x
  3. Step 3: Cross multiply
    233.40x = 349.92 × 89.16
  4. Step 4: Simplify right side
    233.40x = 31,198.87
  5. Step 5: Solve for x
    x = 31,198.87/233.40
  6. Step 6: Final answer
    x = 133.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.