Home / 2,990.38-4,485.56-1,425.64

Finding the Fourth Proportional to 2,990.38, 4,485.56 and 1,425.64

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Solution

The fourth proportional to 2,990.38, 4,485.56 and 1,425.64 is: 2,138.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.38 : 4,485.56 = 1,425.64 : x
  2. Step 2: Convert to fraction form
    2,990.38/4,485.56 = 1,425.64/x
  3. Step 3: Cross multiply
    2,990.38x = 4,485.56 × 1,425.64
  4. Step 4: Simplify right side
    2,990.38x = 6,394,793.76
  5. Step 5: Solve for x
    x = 6,394,793.76/2,990.38
  6. Step 6: Final answer
    x = 2,138.46

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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.