Home / 1,439.21-2,158.28-1,131.66

Finding the Fourth Proportional to 1,439.21, 2,158.28 and 1,131.66

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Solution

The fourth proportional to 1,439.21, 2,158.28 and 1,131.66 is: 1,697.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.21 : 2,158.28 = 1,131.66 : x
  2. Step 2: Convert to fraction form
    1,439.21/2,158.28 = 1,131.66/x
  3. Step 3: Cross multiply
    1,439.21x = 2,158.28 × 1,131.66
  4. Step 4: Simplify right side
    1,439.21x = 2,442,436.32
  5. Step 5: Solve for x
    x = 2,442,436.32/1,439.21
  6. Step 6: Final answer
    x = 1,697.07

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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.