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Finding the Fourth Proportional to 43, 64.48 and 15.94

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Solution

The fourth proportional to 43, 64.48 and 15.94 is: 23.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    43 : 64.48 = 15.94 : x
  2. Step 2: Convert to fraction form
    43/64.48 = 15.94/x
  3. Step 3: Cross multiply
    43x = 64.48 × 15.94
  4. Step 4: Simplify right side
    43x = 1,027.81
  5. Step 5: Solve for x
    x = 1,027.81/43
  6. Step 6: Final answer
    x = 23.90

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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.