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Finding the Fourth Proportional to 494.61, 682.62 and 284.80

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Solution

The fourth proportional to 494.61, 682.62 and 284.80 is: 393.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.61 : 682.62 = 284.80 : x
  2. Step 2: Convert to fraction form
    494.61/682.62 = 284.80/x
  3. Step 3: Cross multiply
    494.61x = 682.62 × 284.80
  4. Step 4: Simplify right side
    494.61x = 194,410.18
  5. Step 5: Solve for x
    x = 194,410.18/494.61
  6. Step 6: Final answer
    x = 393.06

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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.