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Finding the Fourth Proportional to 824.86, 1,138.56 and 559.68

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Solution

The fourth proportional to 824.86, 1,138.56 and 559.68 is: 772.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.86 : 1,138.56 = 559.68 : x
  2. Step 2: Convert to fraction form
    824.86/1,138.56 = 559.68/x
  3. Step 3: Cross multiply
    824.86x = 1,138.56 × 559.68
  4. Step 4: Simplify right side
    824.86x = 637,229.26
  5. Step 5: Solve for x
    x = 637,229.26/824.86
  6. Step 6: Final answer
    x = 772.53

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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.