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Finding the Fourth Proportional to 38.48, 53.08 and 34.16

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Solution

The fourth proportional to 38.48, 53.08 and 34.16 is: 47.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.48 : 53.08 = 34.16 : x
  2. Step 2: Convert to fraction form
    38.48/53.08 = 34.16/x
  3. Step 3: Cross multiply
    38.48x = 53.08 × 34.16
  4. Step 4: Simplify right side
    38.48x = 1,813.21
  5. Step 5: Solve for x
    x = 1,813.21/38.48
  6. Step 6: Final answer
    x = 47.12

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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.