Home / 2,770.40-4,155.60-1,231.40

Finding the Fourth Proportional to 2,770.40, 4,155.60 and 1,231.40

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Solution

The fourth proportional to 2,770.40, 4,155.60 and 1,231.40 is: 1,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.40 : 4,155.60 = 1,231.40 : x
  2. Step 2: Convert to fraction form
    2,770.40/4,155.60 = 1,231.40/x
  3. Step 3: Cross multiply
    2,770.40x = 4,155.60 × 1,231.40
  4. Step 4: Simplify right side
    2,770.40x = 5,117,205.84
  5. Step 5: Solve for x
    x = 5,117,205.84/2,770.40
  6. Step 6: Final answer
    x = 1,847.10

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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.