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Finding the Fourth Proportional to 824.43, 1,236.60 and 499.71

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Solution

The fourth proportional to 824.43, 1,236.60 and 499.71 is: 749.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.43 : 1,236.60 = 499.71 : x
  2. Step 2: Convert to fraction form
    824.43/1,236.60 = 499.71/x
  3. Step 3: Cross multiply
    824.43x = 1,236.60 × 499.71
  4. Step 4: Simplify right side
    824.43x = 617,941.39
  5. Step 5: Solve for x
    x = 617,941.39/824.43
  6. Step 6: Final answer
    x = 749.54

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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.