Home / 2,659.04-3,991.80-1,689.20

Finding the Fourth Proportional to 2,659.04, 3,991.80 and 1,689.20

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Solution

The fourth proportional to 2,659.04, 3,991.80 and 1,689.20 is: 2,535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.04 : 3,991.80 = 1,689.20 : x
  2. Step 2: Convert to fraction form
    2,659.04/3,991.80 = 1,689.20/x
  3. Step 3: Cross multiply
    2,659.04x = 3,991.80 × 1,689.20
  4. Step 4: Simplify right side
    2,659.04x = 6,742,948.56
  5. Step 5: Solve for x
    x = 6,742,948.56/2,659.04
  6. Step 6: Final answer
    x = 2,535.86

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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.