Home / 1,553.21-2,143.17-889.93

Finding the Fourth Proportional to 1,553.21, 2,143.17 and 889.93

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Solution

The fourth proportional to 1,553.21, 2,143.17 and 889.93 is: 1,227.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.21 : 2,143.17 = 889.93 : x
  2. Step 2: Convert to fraction form
    1,553.21/2,143.17 = 889.93/x
  3. Step 3: Cross multiply
    1,553.21x = 2,143.17 × 889.93
  4. Step 4: Simplify right side
    1,553.21x = 1,907,271.28
  5. Step 5: Solve for x
    x = 1,907,271.28/1,553.21
  6. Step 6: Final answer
    x = 1,227.95

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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.