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Finding the Fourth Proportional to 28.57, 42.59 and 26.98

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Solution

The fourth proportional to 28.57, 42.59 and 26.98 is: 40.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.57 : 42.59 = 26.98 : x
  2. Step 2: Convert to fraction form
    28.57/42.59 = 26.98/x
  3. Step 3: Cross multiply
    28.57x = 42.59 × 26.98
  4. Step 4: Simplify right side
    28.57x = 1,149.08
  5. Step 5: Solve for x
    x = 1,149.08/28.57
  6. Step 6: Final answer
    x = 40.22

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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.