Home / 3,420.90-4,720.64-1,928.84

Finding the Fourth Proportional to 3,420.90, 4,720.64 and 1,928.84

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Solution

The fourth proportional to 3,420.90, 4,720.64 and 1,928.84 is: 2,661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.90 : 4,720.64 = 1,928.84 : x
  2. Step 2: Convert to fraction form
    3,420.90/4,720.64 = 1,928.84/x
  3. Step 3: Cross multiply
    3,420.90x = 4,720.64 × 1,928.84
  4. Step 4: Simplify right side
    3,420.90x = 9,105,359.26
  5. Step 5: Solve for x
    x = 9,105,359.26/3,420.90
  6. Step 6: Final answer
    x = 2,661.69

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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.