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Finding the Fourth Proportional to 2,169.20, 3,254.40 and 937.20

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Solution

The fourth proportional to 2,169.20, 3,254.40 and 937.20 is: 1,406.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.20 : 3,254.40 = 937.20 : x
  2. Step 2: Convert to fraction form
    2,169.20/3,254.40 = 937.20/x
  3. Step 3: Cross multiply
    2,169.20x = 3,254.40 × 937.20
  4. Step 4: Simplify right side
    2,169.20x = 3,050,023.68
  5. Step 5: Solve for x
    x = 3,050,023.68/2,169.20
  6. Step 6: Final answer
    x = 1,406.06

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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.