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Finding the Fourth Proportional to 53.31, 79.98 and 33.02

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Solution

The fourth proportional to 53.31, 79.98 and 33.02 is: 49.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.31 : 79.98 = 33.02 : x
  2. Step 2: Convert to fraction form
    53.31/79.98 = 33.02/x
  3. Step 3: Cross multiply
    53.31x = 79.98 × 33.02
  4. Step 4: Simplify right side
    53.31x = 2,640.77
  5. Step 5: Solve for x
    x = 2,640.77/53.31
  6. Step 6: Final answer
    x = 49.54

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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.