Home / 2,912.40-4,364.60-1,869.20

Finding the Fourth Proportional to 2,912.40, 4,364.60 and 1,869.20

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Solution

The fourth proportional to 2,912.40, 4,364.60 and 1,869.20 is: 2,801.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.40 : 4,364.60 = 1,869.20 : x
  2. Step 2: Convert to fraction form
    2,912.40/4,364.60 = 1,869.20/x
  3. Step 3: Cross multiply
    2,912.40x = 4,364.60 × 1,869.20
  4. Step 4: Simplify right side
    2,912.40x = 8,158,310.32
  5. Step 5: Solve for x
    x = 8,158,310.32/2,912.40
  6. Step 6: Final answer
    x = 2,801.23

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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.