Home / 3,225.20-4,837.80-1,378.40

Finding the Fourth Proportional to 3,225.20, 4,837.80 and 1,378.40

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Solution

The fourth proportional to 3,225.20, 4,837.80 and 1,378.40 is: 2,067.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,225.20 : 4,837.80 = 1,378.40 : x
  2. Step 2: Convert to fraction form
    3,225.20/4,837.80 = 1,378.40/x
  3. Step 3: Cross multiply
    3,225.20x = 4,837.80 × 1,378.40
  4. Step 4: Simplify right side
    3,225.20x = 6,668,423.52
  5. Step 5: Solve for x
    x = 6,668,423.52/3,225.20
  6. Step 6: Final answer
    x = 2,067.60

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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.