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Finding the Fourth Proportional to 349.66, 482.43 and 209.71

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Solution

The fourth proportional to 349.66, 482.43 and 209.71 is: 289.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.66 : 482.43 = 209.71 : x
  2. Step 2: Convert to fraction form
    349.66/482.43 = 209.71/x
  3. Step 3: Cross multiply
    349.66x = 482.43 × 209.71
  4. Step 4: Simplify right side
    349.66x = 101,170.40
  5. Step 5: Solve for x
    x = 101,170.40/349.66
  6. Step 6: Final answer
    x = 289.34

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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.