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Finding the Fourth Proportional to 376.85, 521.06 and 330.72

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Solution

The fourth proportional to 376.85, 521.06 and 330.72 is: 457.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.85 : 521.06 = 330.72 : x
  2. Step 2: Convert to fraction form
    376.85/521.06 = 330.72/x
  3. Step 3: Cross multiply
    376.85x = 521.06 × 330.72
  4. Step 4: Simplify right side
    376.85x = 172,323.31
  5. Step 5: Solve for x
    x = 172,323.31/376.85
  6. Step 6: Final answer
    x = 457.28

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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.