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Finding the Fourth Proportional to 36.61, 54.61 and 30.89

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Solution

The fourth proportional to 36.61, 54.61 and 30.89 is: 46.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    36.61 : 54.61 = 30.89 : x
  2. Step 2: Convert to fraction form
    36.61/54.61 = 30.89/x
  3. Step 3: Cross multiply
    36.61x = 54.61 × 30.89
  4. Step 4: Simplify right side
    36.61x = 1,686.96
  5. Step 5: Solve for x
    x = 1,686.96/36.61
  6. Step 6: Final answer
    x = 46.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.