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Finding the Fourth Proportional to 330.05, 454.88 and 251.20

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Solution

The fourth proportional to 330.05, 454.88 and 251.20 is: 346.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.05 : 454.88 = 251.20 : x
  2. Step 2: Convert to fraction form
    330.05/454.88 = 251.20/x
  3. Step 3: Cross multiply
    330.05x = 454.88 × 251.20
  4. Step 4: Simplify right side
    330.05x = 114,263.58
  5. Step 5: Solve for x
    x = 114,263.58/330.05
  6. Step 6: Final answer
    x = 346.20

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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.