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Finding the Fourth Proportional to 28.07, 41.88 and 25.20

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Solution

The fourth proportional to 28.07, 41.88 and 25.20 is: 37.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.07 : 41.88 = 25.20 : x
  2. Step 2: Convert to fraction form
    28.07/41.88 = 25.20/x
  3. Step 3: Cross multiply
    28.07x = 41.88 × 25.20
  4. Step 4: Simplify right side
    28.07x = 1,055.38
  5. Step 5: Solve for x
    x = 1,055.38/28.07
  6. Step 6: Final answer
    x = 37.60

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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.