Home / 3,971.43-5,479.58-2,478.80

Finding the Fourth Proportional to 3,971.43, 5,479.58 and 2,478.80

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Solution

The fourth proportional to 3,971.43, 5,479.58 and 2,478.80 is: 3,420.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.43 : 5,479.58 = 2,478.80 : x
  2. Step 2: Convert to fraction form
    3,971.43/5,479.58 = 2,478.80/x
  3. Step 3: Cross multiply
    3,971.43x = 5,479.58 × 2,478.80
  4. Step 4: Simplify right side
    3,971.43x = 13,582,802.80
  5. Step 5: Solve for x
    x = 13,582,802.80/3,971.43
  6. Step 6: Final answer
    x = 3,420.13

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1.5x scale

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.