Home / 1,426.21-2,139.27-845.23

Finding the Fourth Proportional to 1,426.21, 2,139.27 and 845.23

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Solution

The fourth proportional to 1,426.21, 2,139.27 and 845.23 is: 1,267.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.21 : 2,139.27 = 845.23 : x
  2. Step 2: Convert to fraction form
    1,426.21/2,139.27 = 845.23/x
  3. Step 3: Cross multiply
    1,426.21x = 2,139.27 × 845.23
  4. Step 4: Simplify right side
    1,426.21x = 1,808,175.18
  5. Step 5: Solve for x
    x = 1,808,175.18/1,426.21
  6. Step 6: Final answer
    x = 1,267.82

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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.