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Finding the Fourth Proportional to 33, 45.50 and 30.39

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Solution

The fourth proportional to 33, 45.50 and 30.39 is: 41.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    33 : 45.50 = 30.39 : x
  2. Step 2: Convert to fraction form
    33/45.50 = 30.39/x
  3. Step 3: Cross multiply
    33x = 45.50 × 30.39
  4. Step 4: Simplify right side
    33x = 1,382.59
  5. Step 5: Solve for x
    x = 1,382.59/33
  6. Step 6: Final answer
    x = 41.90

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.