Home / 2,124.66-3,188.92-1,085.40

Finding the Fourth Proportional to 2,124.66, 3,188.92 and 1,085.40

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Solution

The fourth proportional to 2,124.66, 3,188.92 and 1,085.40 is: 1,629.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.66 : 3,188.92 = 1,085.40 : x
  2. Step 2: Convert to fraction form
    2,124.66/3,188.92 = 1,085.40/x
  3. Step 3: Cross multiply
    2,124.66x = 3,188.92 × 1,085.40
  4. Step 4: Simplify right side
    2,124.66x = 3,461,253.77
  5. Step 5: Solve for x
    x = 3,461,253.77/2,124.66
  6. Step 6: Final answer
    x = 1,629.09

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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.