Home / 2,153.55-2,971.86-1,209.33

Finding the Fourth Proportional to 2,153.55, 2,971.86 and 1,209.33

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Solution

The fourth proportional to 2,153.55, 2,971.86 and 1,209.33 is: 1,668.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.55 : 2,971.86 = 1,209.33 : x
  2. Step 2: Convert to fraction form
    2,153.55/2,971.86 = 1,209.33/x
  3. Step 3: Cross multiply
    2,153.55x = 2,971.86 × 1,209.33
  4. Step 4: Simplify right side
    2,153.55x = 3,593,954.92
  5. Step 5: Solve for x
    x = 3,593,954.92/2,153.55
  6. Step 6: Final answer
    x = 1,668.85

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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.