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Finding the Fourth Proportional to 376.88, 520.40 and 330.77

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Solution

The fourth proportional to 376.88, 520.40 and 330.77 is: 456.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.88 : 520.40 = 330.77 : x
  2. Step 2: Convert to fraction form
    376.88/520.40 = 330.77/x
  3. Step 3: Cross multiply
    376.88x = 520.40 × 330.77
  4. Step 4: Simplify right side
    376.88x = 172,132.71
  5. Step 5: Solve for x
    x = 172,132.71/376.88
  6. Step 6: Final answer
    x = 456.73

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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.