Home / 3,420.40-4,720.78-2,162.06

Finding the Fourth Proportional to 3,420.40, 4,720.78 and 2,162.06

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Solution

The fourth proportional to 3,420.40, 4,720.78 and 2,162.06 is: 2,984.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.40 : 4,720.78 = 2,162.06 : x
  2. Step 2: Convert to fraction form
    3,420.40/4,720.78 = 2,162.06/x
  3. Step 3: Cross multiply
    3,420.40x = 4,720.78 × 2,162.06
  4. Step 4: Simplify right side
    3,420.40x = 10,206,609.61
  5. Step 5: Solve for x
    x = 10,206,609.61/3,420.40
  6. Step 6: Final answer
    x = 2,984.04

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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.