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Finding the Fourth Proportional to 1,399.88, 1,927.60 and 1,268.06

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Solution

The fourth proportional to 1,399.88, 1,927.60 and 1,268.06 is: 1,746.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.88 : 1,927.60 = 1,268.06 : x
  2. Step 2: Convert to fraction form
    1,399.88/1,927.60 = 1,268.06/x
  3. Step 3: Cross multiply
    1,399.88x = 1,927.60 × 1,268.06
  4. Step 4: Simplify right side
    1,399.88x = 2,444,299.65
  5. Step 5: Solve for x
    x = 2,444,299.65/1,399.88
  6. Step 6: Final answer
    x = 1,746.07

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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.