Home / 1,553.96-2,144.40-890.87

Finding the Fourth Proportional to 1,553.96, 2,144.40 and 890.87

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Solution

The fourth proportional to 1,553.96, 2,144.40 and 890.87 is: 1,229.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.96 : 2,144.40 = 890.87 : x
  2. Step 2: Convert to fraction form
    1,553.96/2,144.40 = 890.87/x
  3. Step 3: Cross multiply
    1,553.96x = 2,144.40 × 890.87
  4. Step 4: Simplify right side
    1,553.96x = 1,910,381.63
  5. Step 5: Solve for x
    x = 1,910,381.63/1,553.96
  6. Step 6: Final answer
    x = 1,229.36

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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.