Home / 2,159.76-3,240.81-1,429.68

Finding the Fourth Proportional to 2,159.76, 3,240.81 and 1,429.68

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Solution

The fourth proportional to 2,159.76, 3,240.81 and 1,429.68 is: 2,145.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.76 : 3,240.81 = 1,429.68 : x
  2. Step 2: Convert to fraction form
    2,159.76/3,240.81 = 1,429.68/x
  3. Step 3: Cross multiply
    2,159.76x = 3,240.81 × 1,429.68
  4. Step 4: Simplify right side
    2,159.76x = 4,633,321.24
  5. Step 5: Solve for x
    x = 4,633,321.24/2,159.76
  6. Step 6: Final answer
    x = 2,145.29

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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.