Home / 1,929.89-2,894.59-680.26

Finding the Fourth Proportional to 1,929.89, 2,894.59 and 680.26

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Solution

The fourth proportional to 1,929.89, 2,894.59 and 680.26 is: 1,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.89 : 2,894.59 = 680.26 : x
  2. Step 2: Convert to fraction form
    1,929.89/2,894.59 = 680.26/x
  3. Step 3: Cross multiply
    1,929.89x = 2,894.59 × 680.26
  4. Step 4: Simplify right side
    1,929.89x = 1,969,073.79
  5. Step 5: Solve for x
    x = 1,969,073.79/1,929.89
  6. Step 6: Final answer
    x = 1,020.30

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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.