Home / 2,159.21-3,239.78-1,185.29

Finding the Fourth Proportional to 2,159.21, 3,239.78 and 1,185.29

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Solution

The fourth proportional to 2,159.21, 3,239.78 and 1,185.29 is: 1,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.21 : 3,239.78 = 1,185.29 : x
  2. Step 2: Convert to fraction form
    2,159.21/3,239.78 = 1,185.29/x
  3. Step 3: Cross multiply
    2,159.21x = 3,239.78 × 1,185.29
  4. Step 4: Simplify right side
    2,159.21x = 3,840,056.71
  5. Step 5: Solve for x
    x = 3,840,056.71/2,159.21
  6. Step 6: Final answer
    x = 1,778.45

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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.