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Finding the Fourth Proportional to 376.68, 520.38 and 355.08

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Solution

The fourth proportional to 376.68, 520.38 and 355.08 is: 490.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.68 : 520.38 = 355.08 : x
  2. Step 2: Convert to fraction form
    376.68/520.38 = 355.08/x
  3. Step 3: Cross multiply
    376.68x = 520.38 × 355.08
  4. Step 4: Simplify right side
    376.68x = 184,776.53
  5. Step 5: Solve for x
    x = 184,776.53/376.68
  6. Step 6: Final answer
    x = 490.54

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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.