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Finding the Fourth Proportional to 1,426.77, 2,139.96 and 452.88

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Solution

The fourth proportional to 1,426.77, 2,139.96 and 452.88 is: 679.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.77 : 2,139.96 = 452.88 : x
  2. Step 2: Convert to fraction form
    1,426.77/2,139.96 = 452.88/x
  3. Step 3: Cross multiply
    1,426.77x = 2,139.96 × 452.88
  4. Step 4: Simplify right side
    1,426.77x = 969,145.08
  5. Step 5: Solve for x
    x = 969,145.08/1,426.77
  6. Step 6: Final answer
    x = 679.26

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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.