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Finding the Fourth Proportional to 43.00, 64.49 and 12.56

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Solution

The fourth proportional to 43.00, 64.49 and 12.56 is: 18.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.00 : 64.49 = 12.56 : x
  2. Step 2: Convert to fraction form
    43.00/64.49 = 12.56/x
  3. Step 3: Cross multiply
    43.00x = 64.49 × 12.56
  4. Step 4: Simplify right side
    43.00x = 810.19
  5. Step 5: Solve for x
    x = 810.19/43.00
  6. Step 6: Final answer
    x = 18.84

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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.