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Finding the Fourth Proportional to 255.66, 383.22 and 219.48

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Solution

The fourth proportional to 255.66, 383.22 and 219.48 is: 328.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.66 : 383.22 = 219.48 : x
  2. Step 2: Convert to fraction form
    255.66/383.22 = 219.48/x
  3. Step 3: Cross multiply
    255.66x = 383.22 × 219.48
  4. Step 4: Simplify right side
    255.66x = 84,109.13
  5. Step 5: Solve for x
    x = 84,109.13/255.66
  6. Step 6: Final answer
    x = 328.99

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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.