Home / 1,921.42-2,649.70-1,165.03

Finding the Fourth Proportional to 1,921.42, 2,649.70 and 1,165.03

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Solution

The fourth proportional to 1,921.42, 2,649.70 and 1,165.03 is: 1,606.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.42 : 2,649.70 = 1,165.03 : x
  2. Step 2: Convert to fraction form
    1,921.42/2,649.70 = 1,165.03/x
  3. Step 3: Cross multiply
    1,921.42x = 2,649.70 × 1,165.03
  4. Step 4: Simplify right side
    1,921.42x = 3,086,979.99
  5. Step 5: Solve for x
    x = 3,086,979.99/1,921.42
  6. Step 6: Final answer
    x = 1,606.61

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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.