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Finding the Fourth Proportional to 372.19, 556.98 and 321.43

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Solution

The fourth proportional to 372.19, 556.98 and 321.43 is: 481.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.19 : 556.98 = 321.43 : x
  2. Step 2: Convert to fraction form
    372.19/556.98 = 321.43/x
  3. Step 3: Cross multiply
    372.19x = 556.98 × 321.43
  4. Step 4: Simplify right side
    372.19x = 179,030.08
  5. Step 5: Solve for x
    x = 179,030.08/372.19
  6. Step 6: Final answer
    x = 481.02

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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.