Home / 3,120.12-4,678.16-2,190.51

Finding the Fourth Proportional to 3,120.12, 4,678.16 and 2,190.51

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Solution

The fourth proportional to 3,120.12, 4,678.16 and 2,190.51 is: 3,284.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.12 : 4,678.16 = 2,190.51 : x
  2. Step 2: Convert to fraction form
    3,120.12/4,678.16 = 2,190.51/x
  3. Step 3: Cross multiply
    3,120.12x = 4,678.16 × 2,190.51
  4. Step 4: Simplify right side
    3,120.12x = 10,247,545.31
  5. Step 5: Solve for x
    x = 10,247,545.31/3,120.12
  6. Step 6: Final answer
    x = 3,284.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.