Home / 3,420.38-4,720.32-1,928.41

Finding the Fourth Proportional to 3,420.38, 4,720.32 and 1,928.41

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Solution

The fourth proportional to 3,420.38, 4,720.32 and 1,928.41 is: 2,661.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.38 : 4,720.32 = 1,928.41 : x
  2. Step 2: Convert to fraction form
    3,420.38/4,720.32 = 1,928.41/x
  3. Step 3: Cross multiply
    3,420.38x = 4,720.32 × 1,928.41
  4. Step 4: Simplify right side
    3,420.38x = 9,102,700.49
  5. Step 5: Solve for x
    x = 9,102,700.49/3,420.38
  6. Step 6: Final answer
    x = 2,661.31

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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.