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Finding the Fourth Proportional to 794.86, 1,096.68 and 663.64

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Solution

The fourth proportional to 794.86, 1,096.68 and 663.64 is: 915.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.86 : 1,096.68 = 663.64 : x
  2. Step 2: Convert to fraction form
    794.86/1,096.68 = 663.64/x
  3. Step 3: Cross multiply
    794.86x = 1,096.68 × 663.64
  4. Step 4: Simplify right side
    794.86x = 727,800.72
  5. Step 5: Solve for x
    x = 727,800.72/794.86
  6. Step 6: Final answer
    x = 915.63

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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.