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Finding the Fourth Proportional to 376.74, 520.29 and 299.70

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Solution

The fourth proportional to 376.74, 520.29 and 299.70 is: 413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.74 : 520.29 = 299.70 : x
  2. Step 2: Convert to fraction form
    376.74/520.29 = 299.70/x
  3. Step 3: Cross multiply
    376.74x = 520.29 × 299.70
  4. Step 4: Simplify right side
    376.74x = 155,930.91
  5. Step 5: Solve for x
    x = 155,930.91/376.74
  6. Step 6: Final answer
    x = 413.90

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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.