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Finding the Fourth Proportional to 1,427.85, 2,135.85 and 1,340.37

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Solution

The fourth proportional to 1,427.85, 2,135.85 and 1,340.37 is: 2,004.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.85 : 2,135.85 = 1,340.37 : x
  2. Step 2: Convert to fraction form
    1,427.85/2,135.85 = 1,340.37/x
  3. Step 3: Cross multiply
    1,427.85x = 2,135.85 × 1,340.37
  4. Step 4: Simplify right side
    1,427.85x = 2,862,820.12
  5. Step 5: Solve for x
    x = 2,862,820.12/1,427.85
  6. Step 6: Final answer
    x = 2,004.99

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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.