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Finding the Fourth Proportional to 792.08, 1,090.68 and 708.92

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Solution

The fourth proportional to 792.08, 1,090.68 and 708.92 is: 976.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.08 : 1,090.68 = 708.92 : x
  2. Step 2: Convert to fraction form
    792.08/1,090.68 = 708.92/x
  3. Step 3: Cross multiply
    792.08x = 1,090.68 × 708.92
  4. Step 4: Simplify right side
    792.08x = 773,204.87
  5. Step 5: Solve for x
    x = 773,204.87/792.08
  6. Step 6: Final answer
    x = 976.17

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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.