Home / 1,553.48-2,144.12-890.78

Finding the Fourth Proportional to 1,553.48, 2,144.12 and 890.78

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Solution

The fourth proportional to 1,553.48, 2,144.12 and 890.78 is: 1,229.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.48 : 2,144.12 = 890.78 : x
  2. Step 2: Convert to fraction form
    1,553.48/2,144.12 = 890.78/x
  3. Step 3: Cross multiply
    1,553.48x = 2,144.12 × 890.78
  4. Step 4: Simplify right side
    1,553.48x = 1,909,940.12
  5. Step 5: Solve for x
    x = 1,909,940.12/1,553.48
  6. Step 6: Final answer
    x = 1,229.46

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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.