Home / 3,136.85-4,328.90-1,720.68

Finding the Fourth Proportional to 3,136.85, 4,328.90 and 1,720.68

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Solution

The fourth proportional to 3,136.85, 4,328.90 and 1,720.68 is: 2,374.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.85 : 4,328.90 = 1,720.68 : x
  2. Step 2: Convert to fraction form
    3,136.85/4,328.90 = 1,720.68/x
  3. Step 3: Cross multiply
    3,136.85x = 4,328.90 × 1,720.68
  4. Step 4: Simplify right side
    3,136.85x = 7,448,630.01
  5. Step 5: Solve for x
    x = 7,448,630.01/3,136.85
  6. Step 6: Final answer
    x = 2,374.56

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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.