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Finding the Fourth Proportional to 376.72, 520.14 and 289.96

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Solution

The fourth proportional to 376.72, 520.14 and 289.96 is: 400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.72 : 520.14 = 289.96 : x
  2. Step 2: Convert to fraction form
    376.72/520.14 = 289.96/x
  3. Step 3: Cross multiply
    376.72x = 520.14 × 289.96
  4. Step 4: Simplify right side
    376.72x = 150,819.79
  5. Step 5: Solve for x
    x = 150,819.79/376.72
  6. Step 6: Final answer
    x = 400.35

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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.