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Finding the Fourth Proportional to 53.55, 80.40 and 33.35

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Solution

The fourth proportional to 53.55, 80.40 and 33.35 is: 50.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.55 : 80.40 = 33.35 : x
  2. Step 2: Convert to fraction form
    53.55/80.40 = 33.35/x
  3. Step 3: Cross multiply
    53.55x = 80.40 × 33.35
  4. Step 4: Simplify right side
    53.55x = 2,680.94
  5. Step 5: Solve for x
    x = 2,680.94/53.55
  6. Step 6: Final answer
    x = 50.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.