Home / 2,021.54-3,030.08-851.21

Finding the Fourth Proportional to 2,021.54, 3,030.08 and 851.21

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Solution

The fourth proportional to 2,021.54, 3,030.08 and 851.21 is: 1,275.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.54 : 3,030.08 = 851.21 : x
  2. Step 2: Convert to fraction form
    2,021.54/3,030.08 = 851.21/x
  3. Step 3: Cross multiply
    2,021.54x = 3,030.08 × 851.21
  4. Step 4: Simplify right side
    2,021.54x = 2,579,214.99
  5. Step 5: Solve for x
    x = 2,579,214.99/2,021.54
  6. Step 6: Final answer
    x = 1,275.87

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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.