Home / 2,253.70-3,109.80-1,309.48

Finding the Fourth Proportional to 2,253.70, 3,109.80 and 1,309.48

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Solution

The fourth proportional to 2,253.70, 3,109.80 and 1,309.48 is: 1,806.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,253.70 : 3,109.80 = 1,309.48 : x
  2. Step 2: Convert to fraction form
    2,253.70/3,109.80 = 1,309.48/x
  3. Step 3: Cross multiply
    2,253.70x = 3,109.80 × 1,309.48
  4. Step 4: Simplify right side
    2,253.70x = 4,072,220.90
  5. Step 5: Solve for x
    x = 4,072,220.90/2,253.70
  6. Step 6: Final answer
    x = 1,806.90

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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.