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Finding the Fourth Proportional to 376.50, 519.71 and 289.02

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Solution

The fourth proportional to 376.50, 519.71 and 289.02 is: 398.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.50 : 519.71 = 289.02 : x
  2. Step 2: Convert to fraction form
    376.50/519.71 = 289.02/x
  3. Step 3: Cross multiply
    376.50x = 519.71 × 289.02
  4. Step 4: Simplify right side
    376.50x = 150,205.14
  5. Step 5: Solve for x
    x = 150,205.14/376.50
  6. Step 6: Final answer
    x = 398.95

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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.