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Finding the Fourth Proportional to 1,591.42, 2,194 and 1,118.48

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Solution

The fourth proportional to 1,591.42, 2,194 and 1,118.48 is: 1,541.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.42 : 2,194 = 1,118.48 : x
  2. Step 2: Convert to fraction form
    1,591.42/2,194 = 1,118.48/x
  3. Step 3: Cross multiply
    1,591.42x = 2,194 × 1,118.48
  4. Step 4: Simplify right side
    1,591.42x = 2,453,945.12
  5. Step 5: Solve for x
    x = 2,453,945.12/1,591.42
  6. Step 6: Final answer
    x = 1,541.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.