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Finding the Fourth Proportional to 498.11, 687.15 and 301.48

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Solution

The fourth proportional to 498.11, 687.15 and 301.48 is: 415.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.11 : 687.15 = 301.48 : x
  2. Step 2: Convert to fraction form
    498.11/687.15 = 301.48/x
  3. Step 3: Cross multiply
    498.11x = 687.15 × 301.48
  4. Step 4: Simplify right side
    498.11x = 207,160.26
  5. Step 5: Solve for x
    x = 207,160.26/498.11
  6. Step 6: Final answer
    x = 415.90

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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.