Home / 1,553.18-2,143.36-889.99

Finding the Fourth Proportional to 1,553.18, 2,143.36 and 889.99

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Solution

The fourth proportional to 1,553.18, 2,143.36 and 889.99 is: 1,228.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.18 : 2,143.36 = 889.99 : x
  2. Step 2: Convert to fraction form
    1,553.18/2,143.36 = 889.99/x
  3. Step 3: Cross multiply
    1,553.18x = 2,143.36 × 889.99
  4. Step 4: Simplify right side
    1,553.18x = 1,907,564.72
  5. Step 5: Solve for x
    x = 1,907,564.72/1,553.18
  6. Step 6: Final answer
    x = 1,228.17

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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.