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Finding the Fourth Proportional to 39.19, 53.94 and 35.54

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Solution

The fourth proportional to 39.19, 53.94 and 35.54 is: 48.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.19 : 53.94 = 35.54 : x
  2. Step 2: Convert to fraction form
    39.19/53.94 = 35.54/x
  3. Step 3: Cross multiply
    39.19x = 53.94 × 35.54
  4. Step 4: Simplify right side
    39.19x = 1,917.03
  5. Step 5: Solve for x
    x = 1,917.03/39.19
  6. Step 6: Final answer
    x = 48.92

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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.