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Finding the Fourth Proportional to 233.25, 349.78 and 70.90

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Solution

The fourth proportional to 233.25, 349.78 and 70.90 is: 106.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.25 : 349.78 = 70.90 : x
  2. Step 2: Convert to fraction form
    233.25/349.78 = 70.90/x
  3. Step 3: Cross multiply
    233.25x = 349.78 × 70.90
  4. Step 4: Simplify right side
    233.25x = 24,799.57
  5. Step 5: Solve for x
    x = 24,799.57/233.25
  6. Step 6: Final answer
    x = 106.32

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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.