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Finding the Fourth Proportional to 321.24, 479.22 and 270.22

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Solution

The fourth proportional to 321.24, 479.22 and 270.22 is: 403.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.24 : 479.22 = 270.22 : x
  2. Step 2: Convert to fraction form
    321.24/479.22 = 270.22/x
  3. Step 3: Cross multiply
    321.24x = 479.22 × 270.22
  4. Step 4: Simplify right side
    321.24x = 129,494.83
  5. Step 5: Solve for x
    x = 129,494.83/321.24
  6. Step 6: Final answer
    x = 403.11

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1.5x scale

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.