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Finding the Fourth Proportional to 64.32, 96.40 and 33.84

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Solution

The fourth proportional to 64.32, 96.40 and 33.84 is: 50.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.32 : 96.40 = 33.84 : x
  2. Step 2: Convert to fraction form
    64.32/96.40 = 33.84/x
  3. Step 3: Cross multiply
    64.32x = 96.40 × 33.84
  4. Step 4: Simplify right side
    64.32x = 3,262.18
  5. Step 5: Solve for x
    x = 3,262.18/64.32
  6. Step 6: Final answer
    x = 50.72

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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.