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Finding the Fourth Proportional to 415.66, 622.98 and 328.66

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Solution

The fourth proportional to 415.66, 622.98 and 328.66 is: 492.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.66 : 622.98 = 328.66 : x
  2. Step 2: Convert to fraction form
    415.66/622.98 = 328.66/x
  3. Step 3: Cross multiply
    415.66x = 622.98 × 328.66
  4. Step 4: Simplify right side
    415.66x = 204,748.61
  5. Step 5: Solve for x
    x = 204,748.61/415.66
  6. Step 6: Final answer
    x = 492.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.