Home / 3,420.90-4,721.36-1,928.95

Finding the Fourth Proportional to 3,420.90, 4,721.36 and 1,928.95

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Solution

The fourth proportional to 3,420.90, 4,721.36 and 1,928.95 is: 2,662.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.90 : 4,721.36 = 1,928.95 : x
  2. Step 2: Convert to fraction form
    3,420.90/4,721.36 = 1,928.95/x
  3. Step 3: Cross multiply
    3,420.90x = 4,721.36 × 1,928.95
  4. Step 4: Simplify right side
    3,420.90x = 9,107,245.92
  5. Step 5: Solve for x
    x = 9,107,245.92/3,420.90
  6. Step 6: Final answer
    x = 2,662.24

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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.