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Finding the Fourth Proportional to 30.43, 42.02 and 26.31

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Solution

The fourth proportional to 30.43, 42.02 and 26.31 is: 36.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.43 : 42.02 = 26.31 : x
  2. Step 2: Convert to fraction form
    30.43/42.02 = 26.31/x
  3. Step 3: Cross multiply
    30.43x = 42.02 × 26.31
  4. Step 4: Simplify right side
    30.43x = 1,105.55
  5. Step 5: Solve for x
    x = 1,105.55/30.43
  6. Step 6: Final answer
    x = 36.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.