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Finding the Fourth Proportional to 339.21, 468.55 and 250.87

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Solution

The fourth proportional to 339.21, 468.55 and 250.87 is: 346.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.21 : 468.55 = 250.87 : x
  2. Step 2: Convert to fraction form
    339.21/468.55 = 250.87/x
  3. Step 3: Cross multiply
    339.21x = 468.55 × 250.87
  4. Step 4: Simplify right side
    339.21x = 117,545.14
  5. Step 5: Solve for x
    x = 117,545.14/339.21
  6. Step 6: Final answer
    x = 346.53

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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.