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Finding the Fourth Proportional to 47.72, 66.08 and 46.72

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Solution

The fourth proportional to 47.72, 66.08 and 46.72 is: 64.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.72 : 66.08 = 46.72 : x
  2. Step 2: Convert to fraction form
    47.72/66.08 = 46.72/x
  3. Step 3: Cross multiply
    47.72x = 66.08 × 46.72
  4. Step 4: Simplify right side
    47.72x = 3,087.26
  5. Step 5: Solve for x
    x = 3,087.26/47.72
  6. Step 6: Final answer
    x = 64.70

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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.