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Finding the Fourth Proportional to 792.08, 1,090.68 and 625.76

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Solution

The fourth proportional to 792.08, 1,090.68 and 625.76 is: 861.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.08 : 1,090.68 = 625.76 : x
  2. Step 2: Convert to fraction form
    792.08/1,090.68 = 625.76/x
  3. Step 3: Cross multiply
    792.08x = 1,090.68 × 625.76
  4. Step 4: Simplify right side
    792.08x = 682,503.92
  5. Step 5: Solve for x
    x = 682,503.92/792.08
  6. Step 6: Final answer
    x = 861.66

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.