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Finding the Fourth Proportional to 418.15, 625.36 and 372.21

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Solution

The fourth proportional to 418.15, 625.36 and 372.21 is: 556.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.15 : 625.36 = 372.21 : x
  2. Step 2: Convert to fraction form
    418.15/625.36 = 372.21/x
  3. Step 3: Cross multiply
    418.15x = 625.36 × 372.21
  4. Step 4: Simplify right side
    418.15x = 232,765.38
  5. Step 5: Solve for x
    x = 232,765.38/418.15
  6. Step 6: Final answer
    x = 556.66

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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.