Home / 1,904.95-2,857.39-518.42

Finding the Fourth Proportional to 1,904.95, 2,857.39 and 518.42

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Solution

The fourth proportional to 1,904.95, 2,857.39 and 518.42 is: 777.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.95 : 2,857.39 = 518.42 : x
  2. Step 2: Convert to fraction form
    1,904.95/2,857.39 = 518.42/x
  3. Step 3: Cross multiply
    1,904.95x = 2,857.39 × 518.42
  4. Step 4: Simplify right side
    1,904.95x = 1,481,328.12
  5. Step 5: Solve for x
    x = 1,481,328.12/1,904.95
  6. Step 6: Final answer
    x = 777.62

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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.