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Finding the Fourth Proportional to 251.93, 379.61 and 207.28

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Solution

The fourth proportional to 251.93, 379.61 and 207.28 is: 312.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.93 : 379.61 = 207.28 : x
  2. Step 2: Convert to fraction form
    251.93/379.61 = 207.28/x
  3. Step 3: Cross multiply
    251.93x = 379.61 × 207.28
  4. Step 4: Simplify right side
    251.93x = 78,683.58
  5. Step 5: Solve for x
    x = 78,683.58/251.93
  6. Step 6: Final answer
    x = 312.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.