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Finding the Fourth Proportional to 32.78, 44.95 and 30.89

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Solution

The fourth proportional to 32.78, 44.95 and 30.89 is: 42.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.78 : 44.95 = 30.89 : x
  2. Step 2: Convert to fraction form
    32.78/44.95 = 30.89/x
  3. Step 3: Cross multiply
    32.78x = 44.95 × 30.89
  4. Step 4: Simplify right side
    32.78x = 1,388.51
  5. Step 5: Solve for x
    x = 1,388.51/32.78
  6. Step 6: Final answer
    x = 42.36

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.