Home / 2,188.64-3,277.20-1,322.40

Finding the Fourth Proportional to 2,188.64, 3,277.20 and 1,322.40

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Solution

The fourth proportional to 2,188.64, 3,277.20 and 1,322.40 is: 1,980.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.64 : 3,277.20 = 1,322.40 : x
  2. Step 2: Convert to fraction form
    2,188.64/3,277.20 = 1,322.40/x
  3. Step 3: Cross multiply
    2,188.64x = 3,277.20 × 1,322.40
  4. Step 4: Simplify right side
    2,188.64x = 4,333,769.28
  5. Step 5: Solve for x
    x = 4,333,769.28/2,188.64
  6. Step 6: Final answer
    x = 1,980.12

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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.