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Finding the Fourth Proportional to 2,591.42, 3,887.03 and 742.53

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Solution

The fourth proportional to 2,591.42, 3,887.03 and 742.53 is: 1,113.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,591.42 : 3,887.03 = 742.53 : x
  2. Step 2: Convert to fraction form
    2,591.42/3,887.03 = 742.53/x
  3. Step 3: Cross multiply
    2,591.42x = 3,887.03 × 742.53
  4. Step 4: Simplify right side
    2,591.42x = 2,886,236.39
  5. Step 5: Solve for x
    x = 2,886,236.39/2,591.42
  6. Step 6: Final answer
    x = 1,113.77

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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.