Home / 3,390.80-4,679.52-2,215.04

Finding the Fourth Proportional to 3,390.80, 4,679.52 and 2,215.04

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Solution

The fourth proportional to 3,390.80, 4,679.52 and 2,215.04 is: 3,056.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.80 : 4,679.52 = 2,215.04 : x
  2. Step 2: Convert to fraction form
    3,390.80/4,679.52 = 2,215.04/x
  3. Step 3: Cross multiply
    3,390.80x = 4,679.52 × 2,215.04
  4. Step 4: Simplify right side
    3,390.80x = 10,365,323.98
  5. Step 5: Solve for x
    x = 10,365,323.98/3,390.80
  6. Step 6: Final answer
    x = 3,056.90

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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.