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Finding the Fourth Proportional to 43.12, 64.54 and 36.64

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Solution

The fourth proportional to 43.12, 64.54 and 36.64 is: 54.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.12 : 64.54 = 36.64 : x
  2. Step 2: Convert to fraction form
    43.12/64.54 = 36.64/x
  3. Step 3: Cross multiply
    43.12x = 64.54 × 36.64
  4. Step 4: Simplify right side
    43.12x = 2,364.75
  5. Step 5: Solve for x
    x = 2,364.75/43.12
  6. Step 6: Final answer
    x = 54.84

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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.