Home / 2,647.20-3,970.80-2,546.40

Finding the Fourth Proportional to 2,647.20, 3,970.80 and 2,546.40

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Solution

The fourth proportional to 2,647.20, 3,970.80 and 2,546.40 is: 3,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.20 : 3,970.80 = 2,546.40 : x
  2. Step 2: Convert to fraction form
    2,647.20/3,970.80 = 2,546.40/x
  3. Step 3: Cross multiply
    2,647.20x = 3,970.80 × 2,546.40
  4. Step 4: Simplify right side
    2,647.20x = 10,111,245.12
  5. Step 5: Solve for x
    x = 10,111,245.12/2,647.20
  6. Step 6: Final answer
    x = 3,819.60

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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.