Home / 2,105.12-2,904.36-1,318.88

Finding the Fourth Proportional to 2,105.12, 2,904.36 and 1,318.88

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Solution

The fourth proportional to 2,105.12, 2,904.36 and 1,318.88 is: 1,819.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.12 : 2,904.36 = 1,318.88 : x
  2. Step 2: Convert to fraction form
    2,105.12/2,904.36 = 1,318.88/x
  3. Step 3: Cross multiply
    2,105.12x = 2,904.36 × 1,318.88
  4. Step 4: Simplify right side
    2,105.12x = 3,830,502.32
  5. Step 5: Solve for x
    x = 3,830,502.32/2,105.12
  6. Step 6: Final answer
    x = 1,819.61

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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.