Home / 2,136.85-2,948.87-1,297.40

Finding the Fourth Proportional to 2,136.85, 2,948.87 and 1,297.40

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Solution

The fourth proportional to 2,136.85, 2,948.87 and 1,297.40 is: 1,790.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.85 : 2,948.87 = 1,297.40 : x
  2. Step 2: Convert to fraction form
    2,136.85/2,948.87 = 1,297.40/x
  3. Step 3: Cross multiply
    2,136.85x = 2,948.87 × 1,297.40
  4. Step 4: Simplify right side
    2,136.85x = 3,825,863.94
  5. Step 5: Solve for x
    x = 3,825,863.94/2,136.85
  6. Step 6: Final answer
    x = 1,790.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.