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Finding the Fourth Proportional to 250.15, 374.91 and 215.77

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Solution

The fourth proportional to 250.15, 374.91 and 215.77 is: 323.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.15 : 374.91 = 215.77 : x
  2. Step 2: Convert to fraction form
    250.15/374.91 = 215.77/x
  3. Step 3: Cross multiply
    250.15x = 374.91 × 215.77
  4. Step 4: Simplify right side
    250.15x = 80,894.33
  5. Step 5: Solve for x
    x = 80,894.33/250.15
  6. Step 6: Final answer
    x = 323.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.