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Finding the Fourth Proportional to 53.51, 73.85 and 38.75

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Solution

The fourth proportional to 53.51, 73.85 and 38.75 is: 53.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.51 : 73.85 = 38.75 : x
  2. Step 2: Convert to fraction form
    53.51/73.85 = 38.75/x
  3. Step 3: Cross multiply
    53.51x = 73.85 × 38.75
  4. Step 4: Simplify right side
    53.51x = 2,861.12
  5. Step 5: Solve for x
    x = 2,861.12/53.51
  6. Step 6: Final answer
    x = 53.47

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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.