Home / 1,911.51-2,636.10-1,273.18

Finding the Fourth Proportional to 1,911.51, 2,636.10 and 1,273.18

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Solution

The fourth proportional to 1,911.51, 2,636.10 and 1,273.18 is: 1,755.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.51 : 2,636.10 = 1,273.18 : x
  2. Step 2: Convert to fraction form
    1,911.51/2,636.10 = 1,273.18/x
  3. Step 3: Cross multiply
    1,911.51x = 2,636.10 × 1,273.18
  4. Step 4: Simplify right side
    1,911.51x = 3,356,229.80
  5. Step 5: Solve for x
    x = 3,356,229.80/1,911.51
  6. Step 6: Final answer
    x = 1,755.80

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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.