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Finding the Fourth Proportional to 498.92, 688.68 and 324.32

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Solution

The fourth proportional to 498.92, 688.68 and 324.32 is: 447.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.92 : 688.68 = 324.32 : x
  2. Step 2: Convert to fraction form
    498.92/688.68 = 324.32/x
  3. Step 3: Cross multiply
    498.92x = 688.68 × 324.32
  4. Step 4: Simplify right side
    498.92x = 223,352.70
  5. Step 5: Solve for x
    x = 223,352.70/498.92
  6. Step 6: Final answer
    x = 447.67

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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.