Home / 1,298.20-1,791.66-723.36

Finding the Fourth Proportional to 1,298.20, 1,791.66 and 723.36

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Solution

The fourth proportional to 1,298.20, 1,791.66 and 723.36 is: 998.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.20 : 1,791.66 = 723.36 : x
  2. Step 2: Convert to fraction form
    1,298.20/1,791.66 = 723.36/x
  3. Step 3: Cross multiply
    1,298.20x = 1,791.66 × 723.36
  4. Step 4: Simplify right side
    1,298.20x = 1,296,015.18
  5. Step 5: Solve for x
    x = 1,296,015.18/1,298.20
  6. Step 6: Final answer
    x = 998.32

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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.