Home / 3,970.42-5,479.20-2,575.60

Finding the Fourth Proportional to 3,970.42, 5,479.20 and 2,575.60

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Solution

The fourth proportional to 3,970.42, 5,479.20 and 2,575.60 is: 3,554.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.42 : 5,479.20 = 2,575.60 : x
  2. Step 2: Convert to fraction form
    3,970.42/5,479.20 = 2,575.60/x
  3. Step 3: Cross multiply
    3,970.42x = 5,479.20 × 2,575.60
  4. Step 4: Simplify right side
    3,970.42x = 14,112,227.52
  5. Step 5: Solve for x
    x = 14,112,227.52/3,970.42
  6. Step 6: Final answer
    x = 3,554.34

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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.