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Finding the Fourth Proportional to 380.62, 571.14 and 289.88

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Solution

The fourth proportional to 380.62, 571.14 and 289.88 is: 434.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.62 : 571.14 = 289.88 : x
  2. Step 2: Convert to fraction form
    380.62/571.14 = 289.88/x
  3. Step 3: Cross multiply
    380.62x = 571.14 × 289.88
  4. Step 4: Simplify right side
    380.62x = 165,562.06
  5. Step 5: Solve for x
    x = 165,562.06/380.62
  6. Step 6: Final answer
    x = 434.98

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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.