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Finding the Fourth Proportional to 292.58, 404.28 and 209.55

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Solution

The fourth proportional to 292.58, 404.28 and 209.55 is: 289.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.58 : 404.28 = 209.55 : x
  2. Step 2: Convert to fraction form
    292.58/404.28 = 209.55/x
  3. Step 3: Cross multiply
    292.58x = 404.28 × 209.55
  4. Step 4: Simplify right side
    292.58x = 84,716.87
  5. Step 5: Solve for x
    x = 84,716.87/292.58
  6. Step 6: Final answer
    x = 289.55

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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.