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Finding the Fourth Proportional to 67.79, 93.54 and 38.28

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Solution

The fourth proportional to 67.79, 93.54 and 38.28 is: 52.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.79 : 93.54 = 38.28 : x
  2. Step 2: Convert to fraction form
    67.79/93.54 = 38.28/x
  3. Step 3: Cross multiply
    67.79x = 93.54 × 38.28
  4. Step 4: Simplify right side
    67.79x = 3,580.71
  5. Step 5: Solve for x
    x = 3,580.71/67.79
  6. Step 6: Final answer
    x = 52.82

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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.