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Finding the Fourth Proportional to 447.08, 669.33 and 309.86

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Solution

The fourth proportional to 447.08, 669.33 and 309.86 is: 463.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.08 : 669.33 = 309.86 : x
  2. Step 2: Convert to fraction form
    447.08/669.33 = 309.86/x
  3. Step 3: Cross multiply
    447.08x = 669.33 × 309.86
  4. Step 4: Simplify right side
    447.08x = 207,398.59
  5. Step 5: Solve for x
    x = 207,398.59/447.08
  6. Step 6: Final answer
    x = 463.90

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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.