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Finding the Fourth Proportional to 792.79, 1,186.45 and 668.86

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Solution

The fourth proportional to 792.79, 1,186.45 and 668.86 is: 1,000.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.79 : 1,186.45 = 668.86 : x
  2. Step 2: Convert to fraction form
    792.79/1,186.45 = 668.86/x
  3. Step 3: Cross multiply
    792.79x = 1,186.45 × 668.86
  4. Step 4: Simplify right side
    792.79x = 793,564.31
  5. Step 5: Solve for x
    x = 793,564.31/792.79
  6. Step 6: Final answer
    x = 1,000.98

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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.