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Finding the Fourth Proportional to 792.21, 1,093.86 and 497.64

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Solution

The fourth proportional to 792.21, 1,093.86 and 497.64 is: 687.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.21 : 1,093.86 = 497.64 : x
  2. Step 2: Convert to fraction form
    792.21/1,093.86 = 497.64/x
  3. Step 3: Cross multiply
    792.21x = 1,093.86 × 497.64
  4. Step 4: Simplify right side
    792.21x = 544,348.49
  5. Step 5: Solve for x
    x = 544,348.49/792.21
  6. Step 6: Final answer
    x = 687.13

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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.