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Finding the Fourth Proportional to 793.68, 1,093.94 and 557.70

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Solution

The fourth proportional to 793.68, 1,093.94 and 557.70 is: 768.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.68 : 1,093.94 = 557.70 : x
  2. Step 2: Convert to fraction form
    793.68/1,093.94 = 557.70/x
  3. Step 3: Cross multiply
    793.68x = 1,093.94 × 557.70
  4. Step 4: Simplify right side
    793.68x = 610,090.34
  5. Step 5: Solve for x
    x = 610,090.34/793.68
  6. Step 6: Final answer
    x = 768.69

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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.