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Finding the Fourth Proportional to 250.90, 374.71 and 218.50

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Solution

The fourth proportional to 250.90, 374.71 and 218.50 is: 326.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.90 : 374.71 = 218.50 : x
  2. Step 2: Convert to fraction form
    250.90/374.71 = 218.50/x
  3. Step 3: Cross multiply
    250.90x = 374.71 × 218.50
  4. Step 4: Simplify right side
    250.90x = 81,874.14
  5. Step 5: Solve for x
    x = 81,874.14/250.90
  6. Step 6: Final answer
    x = 326.32

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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.