Home / 3,585.40-5,378.70-1,394.20

Finding the Fourth Proportional to 3,585.40, 5,378.70 and 1,394.20

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Solution

The fourth proportional to 3,585.40, 5,378.70 and 1,394.20 is: 2,091.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,585.40 : 5,378.70 = 1,394.20 : x
  2. Step 2: Convert to fraction form
    3,585.40/5,378.70 = 1,394.20/x
  3. Step 3: Cross multiply
    3,585.40x = 5,378.70 × 1,394.20
  4. Step 4: Simplify right side
    3,585.40x = 7,498,983.54
  5. Step 5: Solve for x
    x = 7,498,983.54/3,585.40
  6. Step 6: Final answer
    x = 2,091.53

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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.