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Finding the Fourth Proportional to 47, 64.74 and 43.52

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Solution

The fourth proportional to 47, 64.74 and 43.52 is: 59.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    47 : 64.74 = 43.52 : x
  2. Step 2: Convert to fraction form
    47/64.74 = 43.52/x
  3. Step 3: Cross multiply
    47x = 64.74 × 43.52
  4. Step 4: Simplify right side
    47x = 2,817.48
  5. Step 5: Solve for x
    x = 2,817.48/47
  6. Step 6: Final answer
    x = 59.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.