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Finding the Fourth Proportional to 330.56, 493.49 and 294.11

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Solution

The fourth proportional to 330.56, 493.49 and 294.11 is: 439.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.56 : 493.49 = 294.11 : x
  2. Step 2: Convert to fraction form
    330.56/493.49 = 294.11/x
  3. Step 3: Cross multiply
    330.56x = 493.49 × 294.11
  4. Step 4: Simplify right side
    330.56x = 145,140.34
  5. Step 5: Solve for x
    x = 145,140.34/330.56
  6. Step 6: Final answer
    x = 439.07

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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.