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Finding the Fourth Proportional to 2,133.77, 3,200.85 and 747.45

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Solution

The fourth proportional to 2,133.77, 3,200.85 and 747.45 is: 1,121.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,133.77 : 3,200.85 = 747.45 : x
  2. Step 2: Convert to fraction form
    2,133.77/3,200.85 = 747.45/x
  3. Step 3: Cross multiply
    2,133.77x = 3,200.85 × 747.45
  4. Step 4: Simplify right side
    2,133.77x = 2,392,475.33
  5. Step 5: Solve for x
    x = 2,392,475.33/2,133.77
  6. Step 6: Final answer
    x = 1,121.25

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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.