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Finding the Fourth Proportional to 494.34, 683.28 and 447.90

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Solution

The fourth proportional to 494.34, 683.28 and 447.90 is: 619.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.34 : 683.28 = 447.90 : x
  2. Step 2: Convert to fraction form
    494.34/683.28 = 447.90/x
  3. Step 3: Cross multiply
    494.34x = 683.28 × 447.90
  4. Step 4: Simplify right side
    494.34x = 306,041.11
  5. Step 5: Solve for x
    x = 306,041.11/494.34
  6. Step 6: Final answer
    x = 619.09

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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.