Home / 2,479.89-3,420.75-1,640.61

Finding the Fourth Proportional to 2,479.89, 3,420.75 and 1,640.61

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Solution

The fourth proportional to 2,479.89, 3,420.75 and 1,640.61 is: 2,263.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.89 : 3,420.75 = 1,640.61 : x
  2. Step 2: Convert to fraction form
    2,479.89/3,420.75 = 1,640.61/x
  3. Step 3: Cross multiply
    2,479.89x = 3,420.75 × 1,640.61
  4. Step 4: Simplify right side
    2,479.89x = 5,612,116.66
  5. Step 5: Solve for x
    x = 5,612,116.66/2,479.89
  6. Step 6: Final answer
    x = 2,263.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.