Home / 2,162.68-2,984.70-1,231

Finding the Fourth Proportional to 2,162.68, 2,984.70 and 1,231

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Solution

The fourth proportional to 2,162.68, 2,984.70 and 1,231 is: 1,698.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,162.68 : 2,984.70 = 1,231 : x
  2. Step 2: Convert to fraction form
    2,162.68/2,984.70 = 1,231/x
  3. Step 3: Cross multiply
    2,162.68x = 2,984.70 × 1,231
  4. Step 4: Simplify right side
    2,162.68x = 3,674,165.70
  5. Step 5: Solve for x
    x = 3,674,165.70/2,162.68
  6. Step 6: Final answer
    x = 1,698.89

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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.