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Finding the Fourth Proportional to 495.06, 682.29 and 378.90

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Solution

The fourth proportional to 495.06, 682.29 and 378.90 is: 522.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.06 : 682.29 = 378.90 : x
  2. Step 2: Convert to fraction form
    495.06/682.29 = 378.90/x
  3. Step 3: Cross multiply
    495.06x = 682.29 × 378.90
  4. Step 4: Simplify right side
    495.06x = 258,519.68
  5. Step 5: Solve for x
    x = 258,519.68/495.06
  6. Step 6: Final answer
    x = 522.20

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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.