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Finding the Fourth Proportional to 47.12, 64.68 and 43.44

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Solution

The fourth proportional to 47.12, 64.68 and 43.44 is: 59.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.12 : 64.68 = 43.44 : x
  2. Step 2: Convert to fraction form
    47.12/64.68 = 43.44/x
  3. Step 3: Cross multiply
    47.12x = 64.68 × 43.44
  4. Step 4: Simplify right side
    47.12x = 2,809.70
  5. Step 5: Solve for x
    x = 2,809.70/47.12
  6. Step 6: Final answer
    x = 59.63

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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.