Home / 2,479.90-3,422.74-1,640.64

Finding the Fourth Proportional to 2,479.90, 3,422.74 and 1,640.64

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Solution

The fourth proportional to 2,479.90, 3,422.74 and 1,640.64 is: 2,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.90 : 3,422.74 = 1,640.64 : x
  2. Step 2: Convert to fraction form
    2,479.90/3,422.74 = 1,640.64/x
  3. Step 3: Cross multiply
    2,479.90x = 3,422.74 × 1,640.64
  4. Step 4: Simplify right side
    2,479.90x = 5,615,484.15
  5. Step 5: Solve for x
    x = 5,615,484.15/2,479.90
  6. Step 6: Final answer
    x = 2,264.40

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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.