Home / 1,940.87-2,679.32-1,242.65

Finding the Fourth Proportional to 1,940.87, 2,679.32 and 1,242.65

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Solution

The fourth proportional to 1,940.87, 2,679.32 and 1,242.65 is: 1,715.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.87 : 2,679.32 = 1,242.65 : x
  2. Step 2: Convert to fraction form
    1,940.87/2,679.32 = 1,242.65/x
  3. Step 3: Cross multiply
    1,940.87x = 2,679.32 × 1,242.65
  4. Step 4: Simplify right side
    1,940.87x = 3,329,457.00
  5. Step 5: Solve for x
    x = 3,329,457.00/1,940.87
  6. Step 6: Final answer
    x = 1,715.45

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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.