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Finding the Fourth Proportional to 330.07, 455.68 and 225.31

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Solution

The fourth proportional to 330.07, 455.68 and 225.31 is: 311.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.07 : 455.68 = 225.31 : x
  2. Step 2: Convert to fraction form
    330.07/455.68 = 225.31/x
  3. Step 3: Cross multiply
    330.07x = 455.68 × 225.31
  4. Step 4: Simplify right side
    330.07x = 102,669.84
  5. Step 5: Solve for x
    x = 102,669.84/330.07
  6. Step 6: Final answer
    x = 311.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.