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Finding the Fourth Proportional to 447.13, 669.80 and 215.34

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Solution

The fourth proportional to 447.13, 669.80 and 215.34 is: 322.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.13 : 669.80 = 215.34 : x
  2. Step 2: Convert to fraction form
    447.13/669.80 = 215.34/x
  3. Step 3: Cross multiply
    447.13x = 669.80 × 215.34
  4. Step 4: Simplify right side
    447.13x = 144,232.76
  5. Step 5: Solve for x
    x = 144,232.76/447.13
  6. Step 6: Final answer
    x = 322.57

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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.