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Finding the Fourth Proportional to 793.12, 1,188.06 and 577.84

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Solution

The fourth proportional to 793.12, 1,188.06 and 577.84 is: 865.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.12 : 1,188.06 = 577.84 : x
  2. Step 2: Convert to fraction form
    793.12/1,188.06 = 577.84/x
  3. Step 3: Cross multiply
    793.12x = 1,188.06 × 577.84
  4. Step 4: Simplify right side
    793.12x = 686,508.59
  5. Step 5: Solve for x
    x = 686,508.59/793.12
  6. Step 6: Final answer
    x = 865.58

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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.