Home / 1,268.88-1,749.60-1,072.08

Finding the Fourth Proportional to 1,268.88, 1,749.60 and 1,072.08

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Solution

The fourth proportional to 1,268.88, 1,749.60 and 1,072.08 is: 1,478.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.88 : 1,749.60 = 1,072.08 : x
  2. Step 2: Convert to fraction form
    1,268.88/1,749.60 = 1,072.08/x
  3. Step 3: Cross multiply
    1,268.88x = 1,749.60 × 1,072.08
  4. Step 4: Simplify right side
    1,268.88x = 1,875,711.17
  5. Step 5: Solve for x
    x = 1,875,711.17/1,268.88
  6. Step 6: Final answer
    x = 1,478.24

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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.