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Finding the Fourth Proportional to 53.54, 80.30 and 30.72

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Solution

The fourth proportional to 53.54, 80.30 and 30.72 is: 46.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.54 : 80.30 = 30.72 : x
  2. Step 2: Convert to fraction form
    53.54/80.30 = 30.72/x
  3. Step 3: Cross multiply
    53.54x = 80.30 × 30.72
  4. Step 4: Simplify right side
    53.54x = 2,466.89
  5. Step 5: Solve for x
    x = 2,466.89/53.54
  6. Step 6: Final answer
    x = 46.08

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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.