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Finding the Fourth Proportional to 53.95, 74.45 and 29.39

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Solution

The fourth proportional to 53.95, 74.45 and 29.39 is: 40.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.95 : 74.45 = 29.39 : x
  2. Step 2: Convert to fraction form
    53.95/74.45 = 29.39/x
  3. Step 3: Cross multiply
    53.95x = 74.45 × 29.39
  4. Step 4: Simplify right side
    53.95x = 2,187.57
  5. Step 5: Solve for x
    x = 2,187.57/53.95
  6. Step 6: Final answer
    x = 40.55

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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.