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Finding the Fourth Proportional to 447.67, 617.16 and 386.15

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Solution

The fourth proportional to 447.67, 617.16 and 386.15 is: 532.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.67 : 617.16 = 386.15 : x
  2. Step 2: Convert to fraction form
    447.67/617.16 = 386.15/x
  3. Step 3: Cross multiply
    447.67x = 617.16 × 386.15
  4. Step 4: Simplify right side
    447.67x = 238,316.33
  5. Step 5: Solve for x
    x = 238,316.33/447.67
  6. Step 6: Final answer
    x = 532.35

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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.