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Finding the Fourth Proportional to 494.77, 682.89 and 315.37

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Solution

The fourth proportional to 494.77, 682.89 and 315.37 is: 435.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.77 : 682.89 = 315.37 : x
  2. Step 2: Convert to fraction form
    494.77/682.89 = 315.37/x
  3. Step 3: Cross multiply
    494.77x = 682.89 × 315.37
  4. Step 4: Simplify right side
    494.77x = 215,363.02
  5. Step 5: Solve for x
    x = 215,363.02/494.77
  6. Step 6: Final answer
    x = 435.28

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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.