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Finding the Fourth Proportional to 47.05, 65.05 and 40.91

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Solution

The fourth proportional to 47.05, 65.05 and 40.91 is: 56.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.05 : 65.05 = 40.91 : x
  2. Step 2: Convert to fraction form
    47.05/65.05 = 40.91/x
  3. Step 3: Cross multiply
    47.05x = 65.05 × 40.91
  4. Step 4: Simplify right side
    47.05x = 2,661.00
  5. Step 5: Solve for x
    x = 2,661.00/47.05
  6. Step 6: Final answer
    x = 56.56

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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.