Home / 2,153.52-2,971.08-1,221.48

Finding the Fourth Proportional to 2,153.52, 2,971.08 and 1,221.48

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Solution

The fourth proportional to 2,153.52, 2,971.08 and 1,221.48 is: 1,685.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.52 : 2,971.08 = 1,221.48 : x
  2. Step 2: Convert to fraction form
    2,153.52/2,971.08 = 1,221.48/x
  3. Step 3: Cross multiply
    2,153.52x = 2,971.08 × 1,221.48
  4. Step 4: Simplify right side
    2,153.52x = 3,629,114.80
  5. Step 5: Solve for x
    x = 3,629,114.80/2,153.52
  6. Step 6: Final answer
    x = 1,685.20

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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.