Home / 1,553.18-2,142.87-889.57

Finding the Fourth Proportional to 1,553.18, 2,142.87 and 889.57

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Solution

The fourth proportional to 1,553.18, 2,142.87 and 889.57 is: 1,227.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.18 : 2,142.87 = 889.57 : x
  2. Step 2: Convert to fraction form
    1,553.18/2,142.87 = 889.57/x
  3. Step 3: Cross multiply
    1,553.18x = 2,142.87 × 889.57
  4. Step 4: Simplify right side
    1,553.18x = 1,906,232.87
  5. Step 5: Solve for x
    x = 1,906,232.87/1,553.18
  6. Step 6: Final answer
    x = 1,227.31

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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.