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Finding the Fourth Proportional to 824.41, 1,236.71 and 671.64

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Solution

The fourth proportional to 824.41, 1,236.71 and 671.64 is: 1,007.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.41 : 1,236.71 = 671.64 : x
  2. Step 2: Convert to fraction form
    824.41/1,236.71 = 671.64/x
  3. Step 3: Cross multiply
    824.41x = 1,236.71 × 671.64
  4. Step 4: Simplify right side
    824.41x = 830,623.90
  5. Step 5: Solve for x
    x = 830,623.90/824.41
  6. Step 6: Final answer
    x = 1,007.54

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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.