Home / 1,553.45-2,144.07-890.37

Finding the Fourth Proportional to 1,553.45, 2,144.07 and 890.37

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Solution

The fourth proportional to 1,553.45, 2,144.07 and 890.37 is: 1,228.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.45 : 2,144.07 = 890.37 : x
  2. Step 2: Convert to fraction form
    1,553.45/2,144.07 = 890.37/x
  3. Step 3: Cross multiply
    1,553.45x = 2,144.07 × 890.37
  4. Step 4: Simplify right side
    1,553.45x = 1,909,015.61
  5. Step 5: Solve for x
    x = 1,909,015.61/1,553.45
  6. Step 6: Final answer
    x = 1,228.89

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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.