Home / 2,440.20-3,662.10-980.40

Finding the Fourth Proportional to 2,440.20, 3,662.10 and 980.40

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Solution

The fourth proportional to 2,440.20, 3,662.10 and 980.40 is: 1,471.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,440.20 : 3,662.10 = 980.40 : x
  2. Step 2: Convert to fraction form
    2,440.20/3,662.10 = 980.40/x
  3. Step 3: Cross multiply
    2,440.20x = 3,662.10 × 980.40
  4. Step 4: Simplify right side
    2,440.20x = 3,590,322.84
  5. Step 5: Solve for x
    x = 3,590,322.84/2,440.20
  6. Step 6: Final answer
    x = 1,471.32

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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.