Home / 1,553.09-2,143.40-889.92

Finding the Fourth Proportional to 1,553.09, 2,143.40 and 889.92

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Solution

The fourth proportional to 1,553.09, 2,143.40 and 889.92 is: 1,228.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.09 : 2,143.40 = 889.92 : x
  2. Step 2: Convert to fraction form
    1,553.09/2,143.40 = 889.92/x
  3. Step 3: Cross multiply
    1,553.09x = 2,143.40 × 889.92
  4. Step 4: Simplify right side
    1,553.09x = 1,907,450.08
  5. Step 5: Solve for x
    x = 1,907,450.08/1,553.09
  6. Step 6: Final answer
    x = 1,228.17

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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.