Home / 1,439.22-2,157.20-709.30

Finding the Fourth Proportional to 1,439.22, 2,157.20 and 709.30

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Solution

The fourth proportional to 1,439.22, 2,157.20 and 709.30 is: 1,063.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.22 : 2,157.20 = 709.30 : x
  2. Step 2: Convert to fraction form
    1,439.22/2,157.20 = 709.30/x
  3. Step 3: Cross multiply
    1,439.22x = 2,157.20 × 709.30
  4. Step 4: Simplify right side
    1,439.22x = 1,530,101.96
  5. Step 5: Solve for x
    x = 1,530,101.96/1,439.22
  6. Step 6: Final answer
    x = 1,063.15

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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.