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Finding the Fourth Proportional to 2,241.68, 3,362.90 and 781.72

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Solution

The fourth proportional to 2,241.68, 3,362.90 and 781.72 is: 1,172.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,241.68 : 3,362.90 = 781.72 : x
  2. Step 2: Convert to fraction form
    2,241.68/3,362.90 = 781.72/x
  3. Step 3: Cross multiply
    2,241.68x = 3,362.90 × 781.72
  4. Step 4: Simplify right side
    2,241.68x = 2,628,846.19
  5. Step 5: Solve for x
    x = 2,628,846.19/2,241.68
  6. Step 6: Final answer
    x = 1,172.71

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1.5x scale

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.