Home / 2,178.40-3,267.60-1,314.40

Finding the Fourth Proportional to 2,178.40, 3,267.60 and 1,314.40

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Solution

The fourth proportional to 2,178.40, 3,267.60 and 1,314.40 is: 1,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.40 : 3,267.60 = 1,314.40 : x
  2. Step 2: Convert to fraction form
    2,178.40/3,267.60 = 1,314.40/x
  3. Step 3: Cross multiply
    2,178.40x = 3,267.60 × 1,314.40
  4. Step 4: Simplify right side
    2,178.40x = 4,294,933.44
  5. Step 5: Solve for x
    x = 4,294,933.44/2,178.40
  6. Step 6: Final answer
    x = 1,971.60

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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.