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Finding the Fourth Proportional to 494.13, 740.69 and 220.42

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Solution

The fourth proportional to 494.13, 740.69 and 220.42 is: 330.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.13 : 740.69 = 220.42 : x
  2. Step 2: Convert to fraction form
    494.13/740.69 = 220.42/x
  3. Step 3: Cross multiply
    494.13x = 740.69 × 220.42
  4. Step 4: Simplify right side
    494.13x = 163,259.94
  5. Step 5: Solve for x
    x = 163,259.94/494.13
  6. Step 6: Final answer
    x = 330.40

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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.