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Finding the Fourth Proportional to 498.08, 687.21 and 301.48

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Solution

The fourth proportional to 498.08, 687.21 and 301.48 is: 415.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.08 : 687.21 = 301.48 : x
  2. Step 2: Convert to fraction form
    498.08/687.21 = 301.48/x
  3. Step 3: Cross multiply
    498.08x = 687.21 × 301.48
  4. Step 4: Simplify right side
    498.08x = 207,180.07
  5. Step 5: Solve for x
    x = 207,180.07/498.08
  6. Step 6: Final answer
    x = 415.96

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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.