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Finding the Fourth Proportional to 33, 45.54 and 30.72

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Solution

The fourth proportional to 33, 45.54 and 30.72 is: 42.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    33 : 45.54 = 30.72 : x
  2. Step 2: Convert to fraction form
    33/45.54 = 30.72/x
  3. Step 3: Cross multiply
    33x = 45.54 × 30.72
  4. Step 4: Simplify right side
    33x = 1,398.99
  5. Step 5: Solve for x
    x = 1,398.99/33
  6. Step 6: Final answer
    x = 42.39

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.