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Finding the Fourth Proportional to 379.84, 524.64 and 330.56

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Solution

The fourth proportional to 379.84, 524.64 and 330.56 is: 456.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.84 : 524.64 = 330.56 : x
  2. Step 2: Convert to fraction form
    379.84/524.64 = 330.56/x
  3. Step 3: Cross multiply
    379.84x = 524.64 × 330.56
  4. Step 4: Simplify right side
    379.84x = 173,425.00
  5. Step 5: Solve for x
    x = 173,425.00/379.84
  6. Step 6: Final answer
    x = 456.57

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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.