Home / 3,970.76-5,479.64-2,202.64

Finding the Fourth Proportional to 3,970.76, 5,479.64 and 2,202.64

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Solution

The fourth proportional to 3,970.76, 5,479.64 and 2,202.64 is: 3,039.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.76 : 5,479.64 = 2,202.64 : x
  2. Step 2: Convert to fraction form
    3,970.76/5,479.64 = 2,202.64/x
  3. Step 3: Cross multiply
    3,970.76x = 5,479.64 × 2,202.64
  4. Step 4: Simplify right side
    3,970.76x = 12,069,674.25
  5. Step 5: Solve for x
    x = 12,069,674.25/3,970.76
  6. Step 6: Final answer
    x = 3,039.64

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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.