Home / 3,219.90-4,443.12-2,558.40

Finding the Fourth Proportional to 3,219.90, 4,443.12 and 2,558.40

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Solution

The fourth proportional to 3,219.90, 4,443.12 and 2,558.40 is: 3,530.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.90 : 4,443.12 = 2,558.40 : x
  2. Step 2: Convert to fraction form
    3,219.90/4,443.12 = 2,558.40/x
  3. Step 3: Cross multiply
    3,219.90x = 4,443.12 × 2,558.40
  4. Step 4: Simplify right side
    3,219.90x = 11,367,278.21
  5. Step 5: Solve for x
    x = 11,367,278.21/3,219.90
  6. Step 6: Final answer
    x = 3,530.32

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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.