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Finding the Fourth Proportional to 33.20, 45.60 and 32.40

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Solution

The fourth proportional to 33.20, 45.60 and 32.40 is: 44.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.20 : 45.60 = 32.40 : x
  2. Step 2: Convert to fraction form
    33.20/45.60 = 32.40/x
  3. Step 3: Cross multiply
    33.20x = 45.60 × 32.40
  4. Step 4: Simplify right side
    33.20x = 1,477.44
  5. Step 5: Solve for x
    x = 1,477.44/33.20
  6. Step 6: Final answer
    x = 44.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.