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Finding the Fourth Proportional to 233.15, 349.76 and 70.81

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Solution

The fourth proportional to 233.15, 349.76 and 70.81 is: 106.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.15 : 349.76 = 70.81 : x
  2. Step 2: Convert to fraction form
    233.15/349.76 = 70.81/x
  3. Step 3: Cross multiply
    233.15x = 349.76 × 70.81
  4. Step 4: Simplify right side
    233.15x = 24,766.51
  5. Step 5: Solve for x
    x = 24,766.51/233.15
  6. Step 6: Final answer
    x = 106.23

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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.