Home / 1,591.56-2,197.68-1,172.40

Finding the Fourth Proportional to 1,591.56, 2,197.68 and 1,172.40

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Solution

The fourth proportional to 1,591.56, 2,197.68 and 1,172.40 is: 1,618.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.56 : 2,197.68 = 1,172.40 : x
  2. Step 2: Convert to fraction form
    1,591.56/2,197.68 = 1,172.40/x
  3. Step 3: Cross multiply
    1,591.56x = 2,197.68 × 1,172.40
  4. Step 4: Simplify right side
    1,591.56x = 2,576,560.03
  5. Step 5: Solve for x
    x = 2,576,560.03/1,591.56
  6. Step 6: Final answer
    x = 1,618.89

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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.