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Finding the Fourth Proportional to 498.81, 688.19 and 301.98

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Solution

The fourth proportional to 498.81, 688.19 and 301.98 is: 416.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.81 : 688.19 = 301.98 : x
  2. Step 2: Convert to fraction form
    498.81/688.19 = 301.98/x
  3. Step 3: Cross multiply
    498.81x = 688.19 × 301.98
  4. Step 4: Simplify right side
    498.81x = 207,819.62
  5. Step 5: Solve for x
    x = 207,819.62/498.81
  6. Step 6: Final answer
    x = 416.63

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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.