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Finding the Fourth Proportional to 2,133.86, 3,200.73 and 747.18

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Solution

The fourth proportional to 2,133.86, 3,200.73 and 747.18 is: 1,120.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,133.86 : 3,200.73 = 747.18 : x
  2. Step 2: Convert to fraction form
    2,133.86/3,200.73 = 747.18/x
  3. Step 3: Cross multiply
    2,133.86x = 3,200.73 × 747.18
  4. Step 4: Simplify right side
    2,133.86x = 2,391,521.44
  5. Step 5: Solve for x
    x = 2,391,521.44/2,133.86
  6. Step 6: Final answer
    x = 1,120.75

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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.