Home / 3,489.30-4,815.20-1,917.38

Finding the Fourth Proportional to 3,489.30, 4,815.20 and 1,917.38

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Solution

The fourth proportional to 3,489.30, 4,815.20 and 1,917.38 is: 2,645.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.30 : 4,815.20 = 1,917.38 : x
  2. Step 2: Convert to fraction form
    3,489.30/4,815.20 = 1,917.38/x
  3. Step 3: Cross multiply
    3,489.30x = 4,815.20 × 1,917.38
  4. Step 4: Simplify right side
    3,489.30x = 9,232,534.51
  5. Step 5: Solve for x
    x = 9,232,534.51/3,489.30
  6. Step 6: Final answer
    x = 2,645.96

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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.