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Finding the Fourth Proportional to 1,427.54, 2,140.80 and 605.87

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Solution

The fourth proportional to 1,427.54, 2,140.80 and 605.87 is: 908.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.54 : 2,140.80 = 605.87 : x
  2. Step 2: Convert to fraction form
    1,427.54/2,140.80 = 605.87/x
  3. Step 3: Cross multiply
    1,427.54x = 2,140.80 × 605.87
  4. Step 4: Simplify right side
    1,427.54x = 1,297,046.50
  5. Step 5: Solve for x
    x = 1,297,046.50/1,427.54
  6. Step 6: Final answer
    x = 908.59

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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.