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Finding the Fourth Proportional to 47.67, 65.63 and 40.66

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Solution

The fourth proportional to 47.67, 65.63 and 40.66 is: 55.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.67 : 65.63 = 40.66 : x
  2. Step 2: Convert to fraction form
    47.67/65.63 = 40.66/x
  3. Step 3: Cross multiply
    47.67x = 65.63 × 40.66
  4. Step 4: Simplify right side
    47.67x = 2,668.41
  5. Step 5: Solve for x
    x = 2,668.41/47.67
  6. Step 6: Final answer
    x = 55.98

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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.