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Finding the Fourth Proportional to 349.53, 482.34 and 209.71

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Solution

The fourth proportional to 349.53, 482.34 and 209.71 is: 289.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.53 : 482.34 = 209.71 : x
  2. Step 2: Convert to fraction form
    349.53/482.34 = 209.71/x
  3. Step 3: Cross multiply
    349.53x = 482.34 × 209.71
  4. Step 4: Simplify right side
    349.53x = 101,151.52
  5. Step 5: Solve for x
    x = 101,151.52/349.53
  6. Step 6: Final answer
    x = 289.39

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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.