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Finding the Fourth Proportional to 34.64, 47.42 and 34.56

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Solution

The fourth proportional to 34.64, 47.42 and 34.56 is: 47.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.64 : 47.42 = 34.56 : x
  2. Step 2: Convert to fraction form
    34.64/47.42 = 34.56/x
  3. Step 3: Cross multiply
    34.64x = 47.42 × 34.56
  4. Step 4: Simplify right side
    34.64x = 1,638.84
  5. Step 5: Solve for x
    x = 1,638.84/34.64
  6. Step 6: Final answer
    x = 47.31

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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.