Home / 1,439.20-2,159.52-708.64

Finding the Fourth Proportional to 1,439.20, 2,159.52 and 708.64

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Solution

The fourth proportional to 1,439.20, 2,159.52 and 708.64 is: 1,063.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.20 : 2,159.52 = 708.64 : x
  2. Step 2: Convert to fraction form
    1,439.20/2,159.52 = 708.64/x
  3. Step 3: Cross multiply
    1,439.20x = 2,159.52 × 708.64
  4. Step 4: Simplify right side
    1,439.20x = 1,530,322.25
  5. Step 5: Solve for x
    x = 1,530,322.25/1,439.20
  6. Step 6: Final answer
    x = 1,063.31

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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.