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Finding the Fourth Proportional to 33.90, 46.71 and 31.56

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Solution

The fourth proportional to 33.90, 46.71 and 31.56 is: 43.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.90 : 46.71 = 31.56 : x
  2. Step 2: Convert to fraction form
    33.90/46.71 = 31.56/x
  3. Step 3: Cross multiply
    33.90x = 46.71 × 31.56
  4. Step 4: Simplify right side
    33.90x = 1,474.17
  5. Step 5: Solve for x
    x = 1,474.17/33.90
  6. Step 6: Final answer
    x = 43.49

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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.