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Finding the Fourth Proportional to 377.61, 520.62 and 310.99

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Solution

The fourth proportional to 377.61, 520.62 and 310.99 is: 428.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.61 : 520.62 = 310.99 : x
  2. Step 2: Convert to fraction form
    377.61/520.62 = 310.99/x
  3. Step 3: Cross multiply
    377.61x = 520.62 × 310.99
  4. Step 4: Simplify right side
    377.61x = 161,906.31
  5. Step 5: Solve for x
    x = 161,906.31/377.61
  6. Step 6: Final answer
    x = 428.77

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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.