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Finding the Fourth Proportional to 792, 1,093.86 and 662.40

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Solution

The fourth proportional to 792, 1,093.86 and 662.40 is: 914.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    792 : 1,093.86 = 662.40 : x
  2. Step 2: Convert to fraction form
    792/1,093.86 = 662.40/x
  3. Step 3: Cross multiply
    792x = 1,093.86 × 662.40
  4. Step 4: Simplify right side
    792x = 724,572.86
  5. Step 5: Solve for x
    x = 724,572.86/792
  6. Step 6: Final answer
    x = 914.86

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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.