Home / 2,647.60-3,980.40-2,164.16

Finding the Fourth Proportional to 2,647.60, 3,980.40 and 2,164.16

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Solution

The fourth proportional to 2,647.60, 3,980.40 and 2,164.16 is: 3,253.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.60 : 3,980.40 = 2,164.16 : x
  2. Step 2: Convert to fraction form
    2,647.60/3,980.40 = 2,164.16/x
  3. Step 3: Cross multiply
    2,647.60x = 3,980.40 × 2,164.16
  4. Step 4: Simplify right side
    2,647.60x = 8,614,222.46
  5. Step 5: Solve for x
    x = 8,614,222.46/2,647.60
  6. Step 6: Final answer
    x = 3,253.60

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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.