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Finding the Fourth Proportional to 380.49, 569.55 and 206.73

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Solution

The fourth proportional to 380.49, 569.55 and 206.73 is: 309.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.49 : 569.55 = 206.73 : x
  2. Step 2: Convert to fraction form
    380.49/569.55 = 206.73/x
  3. Step 3: Cross multiply
    380.49x = 569.55 × 206.73
  4. Step 4: Simplify right side
    380.49x = 117,743.07
  5. Step 5: Solve for x
    x = 117,743.07/380.49
  6. Step 6: Final answer
    x = 309.45

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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.