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Finding the Fourth Proportional to 824.44, 1,237.02 and 391.48

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Solution

The fourth proportional to 824.44, 1,237.02 and 391.48 is: 587.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.44 : 1,237.02 = 391.48 : x
  2. Step 2: Convert to fraction form
    824.44/1,237.02 = 391.48/x
  3. Step 3: Cross multiply
    824.44x = 1,237.02 × 391.48
  4. Step 4: Simplify right side
    824.44x = 484,268.59
  5. Step 5: Solve for x
    x = 484,268.59/824.44
  6. Step 6: Final answer
    x = 587.39

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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.