Home / 2,528.91-3,489.82-1,409.78

Finding the Fourth Proportional to 2,528.91, 3,489.82 and 1,409.78

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Solution

The fourth proportional to 2,528.91, 3,489.82 and 1,409.78 is: 1,945.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,528.91 : 3,489.82 = 1,409.78 : x
  2. Step 2: Convert to fraction form
    2,528.91/3,489.82 = 1,409.78/x
  3. Step 3: Cross multiply
    2,528.91x = 3,489.82 × 1,409.78
  4. Step 4: Simplify right side
    2,528.91x = 4,919,883.64
  5. Step 5: Solve for x
    x = 4,919,883.64/2,528.91
  6. Step 6: Final answer
    x = 1,945.46

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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.