Home / 1,611.78-2,223.45-1,021.38

Finding the Fourth Proportional to 1,611.78, 2,223.45 and 1,021.38

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Solution

The fourth proportional to 1,611.78, 2,223.45 and 1,021.38 is: 1,408.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.78 : 2,223.45 = 1,021.38 : x
  2. Step 2: Convert to fraction form
    1,611.78/2,223.45 = 1,021.38/x
  3. Step 3: Cross multiply
    1,611.78x = 2,223.45 × 1,021.38
  4. Step 4: Simplify right side
    1,611.78x = 2,270,987.36
  5. Step 5: Solve for x
    x = 2,270,987.36/1,611.78
  6. Step 6: Final answer
    x = 1,408.99

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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.