Home / 1,418.58-2,129.09-1,085.13

Finding the Fourth Proportional to 1,418.58, 2,129.09 and 1,085.13

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Solution

The fourth proportional to 1,418.58, 2,129.09 and 1,085.13 is: 1,628.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.58 : 2,129.09 = 1,085.13 : x
  2. Step 2: Convert to fraction form
    1,418.58/2,129.09 = 1,085.13/x
  3. Step 3: Cross multiply
    1,418.58x = 2,129.09 × 1,085.13
  4. Step 4: Simplify right side
    1,418.58x = 2,310,334.01
  5. Step 5: Solve for x
    x = 2,310,334.01/1,418.58
  6. Step 6: Final answer
    x = 1,628.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.