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Finding the Fourth Proportional to 39.31, 53.89 and 39.27

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Solution

The fourth proportional to 39.31, 53.89 and 39.27 is: 53.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.31 : 53.89 = 39.27 : x
  2. Step 2: Convert to fraction form
    39.31/53.89 = 39.27/x
  3. Step 3: Cross multiply
    39.31x = 53.89 × 39.27
  4. Step 4: Simplify right side
    39.31x = 2,116.26
  5. Step 5: Solve for x
    x = 2,116.26/39.31
  6. Step 6: Final answer
    x = 53.84

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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.