Home / 2,142.92-3,210.23-1,215.68

Finding the Fourth Proportional to 2,142.92, 3,210.23 and 1,215.68

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Solution

The fourth proportional to 2,142.92, 3,210.23 and 1,215.68 is: 1,821.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.92 : 3,210.23 = 1,215.68 : x
  2. Step 2: Convert to fraction form
    2,142.92/3,210.23 = 1,215.68/x
  3. Step 3: Cross multiply
    2,142.92x = 3,210.23 × 1,215.68
  4. Step 4: Simplify right side
    2,142.92x = 3,902,599.39
  5. Step 5: Solve for x
    x = 3,902,599.39/2,142.92
  6. Step 6: Final answer
    x = 1,821.16

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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.