Home / 2,628.69-3,943.13-680.89

Finding the Fourth Proportional to 2,628.69, 3,943.13 and 680.89

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Solution

The fourth proportional to 2,628.69, 3,943.13 and 680.89 is: 1,021.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.69 : 3,943.13 = 680.89 : x
  2. Step 2: Convert to fraction form
    2,628.69/3,943.13 = 680.89/x
  3. Step 3: Cross multiply
    2,628.69x = 3,943.13 × 680.89
  4. Step 4: Simplify right side
    2,628.69x = 2,684,837.79
  5. Step 5: Solve for x
    x = 2,684,837.79/2,628.69
  6. Step 6: Final answer
    x = 1,021.36

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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.