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Finding the Fourth Proportional to 824.87, 1,237.76 and 338.26

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Solution

The fourth proportional to 824.87, 1,237.76 and 338.26 is: 507.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.87 : 1,237.76 = 338.26 : x
  2. Step 2: Convert to fraction form
    824.87/1,237.76 = 338.26/x
  3. Step 3: Cross multiply
    824.87x = 1,237.76 × 338.26
  4. Step 4: Simplify right side
    824.87x = 418,684.70
  5. Step 5: Solve for x
    x = 418,684.70/824.87
  6. Step 6: Final answer
    x = 507.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.