Home / 3,420.28-4,719.99-1,928.08

Finding the Fourth Proportional to 3,420.28, 4,719.99 and 1,928.08

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Solution

The fourth proportional to 3,420.28, 4,719.99 and 1,928.08 is: 2,660.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.28 : 4,719.99 = 1,928.08 : x
  2. Step 2: Convert to fraction form
    3,420.28/4,719.99 = 1,928.08/x
  3. Step 3: Cross multiply
    3,420.28x = 4,719.99 × 1,928.08
  4. Step 4: Simplify right side
    3,420.28x = 9,100,518.32
  5. Step 5: Solve for x
    x = 9,100,518.32/3,420.28
  6. Step 6: Final answer
    x = 2,660.75

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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.