Home / 2,291.20-3,152.46-2,145.40

Finding the Fourth Proportional to 2,291.20, 3,152.46 and 2,145.40

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Solution

The fourth proportional to 2,291.20, 3,152.46 and 2,145.40 is: 2,951.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.20 : 3,152.46 = 2,145.40 : x
  2. Step 2: Convert to fraction form
    2,291.20/3,152.46 = 2,145.40/x
  3. Step 3: Cross multiply
    2,291.20x = 3,152.46 × 2,145.40
  4. Step 4: Simplify right side
    2,291.20x = 6,763,287.68
  5. Step 5: Solve for x
    x = 6,763,287.68/2,291.20
  6. Step 6: Final answer
    x = 2,951.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.