Home / 1,921.74-2,649.78-1,641.12

Finding the Fourth Proportional to 1,921.74, 2,649.78 and 1,641.12

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Solution

The fourth proportional to 1,921.74, 2,649.78 and 1,641.12 is: 2,262.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.74 : 2,649.78 = 1,641.12 : x
  2. Step 2: Convert to fraction form
    1,921.74/2,649.78 = 1,641.12/x
  3. Step 3: Cross multiply
    1,921.74x = 2,649.78 × 1,641.12
  4. Step 4: Simplify right side
    1,921.74x = 4,348,606.95
  5. Step 5: Solve for x
    x = 4,348,606.95/1,921.74
  6. Step 6: Final answer
    x = 2,262.85

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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.