Home / 1,660.09-2,491.26-686.18

Finding the Fourth Proportional to 1,660.09, 2,491.26 and 686.18

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Solution

The fourth proportional to 1,660.09, 2,491.26 and 686.18 is: 1,029.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.09 : 2,491.26 = 686.18 : x
  2. Step 2: Convert to fraction form
    1,660.09/2,491.26 = 686.18/x
  3. Step 3: Cross multiply
    1,660.09x = 2,491.26 × 686.18
  4. Step 4: Simplify right side
    1,660.09x = 1,709,452.79
  5. Step 5: Solve for x
    x = 1,709,452.79/1,660.09
  6. Step 6: Final answer
    x = 1,029.74

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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.