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Finding the Fourth Proportional to 498.81, 687.90 and 359.85

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Solution

The fourth proportional to 498.81, 687.90 and 359.85 is: 496.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.81 : 687.90 = 359.85 : x
  2. Step 2: Convert to fraction form
    498.81/687.90 = 359.85/x
  3. Step 3: Cross multiply
    498.81x = 687.90 × 359.85
  4. Step 4: Simplify right side
    498.81x = 247,540.82
  5. Step 5: Solve for x
    x = 247,540.82/498.81
  6. Step 6: Final answer
    x = 496.26

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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.