Home / 2,153.44-2,971.68-1,209.15

Finding the Fourth Proportional to 2,153.44, 2,971.68 and 1,209.15

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Solution

The fourth proportional to 2,153.44, 2,971.68 and 1,209.15 is: 1,668.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.44 : 2,971.68 = 1,209.15 : x
  2. Step 2: Convert to fraction form
    2,153.44/2,971.68 = 1,209.15/x
  3. Step 3: Cross multiply
    2,153.44x = 2,971.68 × 1,209.15
  4. Step 4: Simplify right side
    2,153.44x = 3,593,206.87
  5. Step 5: Solve for x
    x = 3,593,206.87/2,153.44
  6. Step 6: Final answer
    x = 1,668.59

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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.