Home / 3,971.55-5,479.40-2,478.92

Finding the Fourth Proportional to 3,971.55, 5,479.40 and 2,478.92

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Solution

The fourth proportional to 3,971.55, 5,479.40 and 2,478.92 is: 3,420.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.55 : 5,479.40 = 2,478.92 : x
  2. Step 2: Convert to fraction form
    3,971.55/5,479.40 = 2,478.92/x
  3. Step 3: Cross multiply
    3,971.55x = 5,479.40 × 2,478.92
  4. Step 4: Simplify right side
    3,971.55x = 13,582,989.93
  5. Step 5: Solve for x
    x = 13,582,989.93/3,971.55
  6. Step 6: Final answer
    x = 3,420.07

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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.