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Finding the Fourth Proportional to 376.91, 520.49 and 356.46

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Solution

The fourth proportional to 376.91, 520.49 and 356.46 is: 492.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.91 : 520.49 = 356.46 : x
  2. Step 2: Convert to fraction form
    376.91/520.49 = 356.46/x
  3. Step 3: Cross multiply
    376.91x = 520.49 × 356.46
  4. Step 4: Simplify right side
    376.91x = 185,533.87
  5. Step 5: Solve for x
    x = 185,533.87/376.91
  6. Step 6: Final answer
    x = 492.25

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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.