Home / 2,921.40-4,392.90-2,446.20

Finding the Fourth Proportional to 2,921.40, 4,392.90 and 2,446.20

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Solution

The fourth proportional to 2,921.40, 4,392.90 and 2,446.20 is: 3,678.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.40 : 4,392.90 = 2,446.20 : x
  2. Step 2: Convert to fraction form
    2,921.40/4,392.90 = 2,446.20/x
  3. Step 3: Cross multiply
    2,921.40x = 4,392.90 × 2,446.20
  4. Step 4: Simplify right side
    2,921.40x = 10,745,911.98
  5. Step 5: Solve for x
    x = 10,745,911.98/2,921.40
  6. Step 6: Final answer
    x = 3,678.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.