Home / 2,021.28-3,031.33-788.39

Finding the Fourth Proportional to 2,021.28, 3,031.33 and 788.39

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Solution

The fourth proportional to 2,021.28, 3,031.33 and 788.39 is: 1,182.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.28 : 3,031.33 = 788.39 : x
  2. Step 2: Convert to fraction form
    2,021.28/3,031.33 = 788.39/x
  3. Step 3: Cross multiply
    2,021.28x = 3,031.33 × 788.39
  4. Step 4: Simplify right side
    2,021.28x = 2,389,870.26
  5. Step 5: Solve for x
    x = 2,389,870.26/2,021.28
  6. Step 6: Final answer
    x = 1,182.35

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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.