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Finding the Fourth Proportional to 2,378.12, 3,567.89 and 734.81

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Solution

The fourth proportional to 2,378.12, 3,567.89 and 734.81 is: 1,102.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.12 : 3,567.89 = 734.81 : x
  2. Step 2: Convert to fraction form
    2,378.12/3,567.89 = 734.81/x
  3. Step 3: Cross multiply
    2,378.12x = 3,567.89 × 734.81
  4. Step 4: Simplify right side
    2,378.12x = 2,621,705.25
  5. Step 5: Solve for x
    x = 2,621,705.25/2,378.12
  6. Step 6: Final answer
    x = 1,102.43

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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.