Home / 2,021.78-3,031.74-1,189.24

Finding the Fourth Proportional to 2,021.78, 3,031.74 and 1,189.24

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Solution

The fourth proportional to 2,021.78, 3,031.74 and 1,189.24 is: 1,783.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.78 : 3,031.74 = 1,189.24 : x
  2. Step 2: Convert to fraction form
    2,021.78/3,031.74 = 1,189.24/x
  3. Step 3: Cross multiply
    2,021.78x = 3,031.74 × 1,189.24
  4. Step 4: Simplify right side
    2,021.78x = 3,605,466.48
  5. Step 5: Solve for x
    x = 3,605,466.48/2,021.78
  6. Step 6: Final answer
    x = 1,783.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.