Home / 1,407-1,939.44-1,126.80

Finding the Fourth Proportional to 1,407, 1,939.44 and 1,126.80

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Solution

The fourth proportional to 1,407, 1,939.44 and 1,126.80 is: 1,553.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407 : 1,939.44 = 1,126.80 : x
  2. Step 2: Convert to fraction form
    1,407/1,939.44 = 1,126.80/x
  3. Step 3: Cross multiply
    1,407x = 1,939.44 × 1,126.80
  4. Step 4: Simplify right side
    1,407x = 2,185,360.99
  5. Step 5: Solve for x
    x = 2,185,360.99/1,407
  6. Step 6: Final answer
    x = 1,553.21

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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.