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Finding the Fourth Proportional to 30.98, 46.28 and 25.18

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Solution

The fourth proportional to 30.98, 46.28 and 25.18 is: 37.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.98 : 46.28 = 25.18 : x
  2. Step 2: Convert to fraction form
    30.98/46.28 = 25.18/x
  3. Step 3: Cross multiply
    30.98x = 46.28 × 25.18
  4. Step 4: Simplify right side
    30.98x = 1,165.33
  5. Step 5: Solve for x
    x = 1,165.33/30.98
  6. Step 6: Final answer
    x = 37.62

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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.