Home / 1,226.37-1,688.66-961.89

Finding the Fourth Proportional to 1,226.37, 1,688.66 and 961.89

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Solution

The fourth proportional to 1,226.37, 1,688.66 and 961.89 is: 1,324.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.37 : 1,688.66 = 961.89 : x
  2. Step 2: Convert to fraction form
    1,226.37/1,688.66 = 961.89/x
  3. Step 3: Cross multiply
    1,226.37x = 1,688.66 × 961.89
  4. Step 4: Simplify right side
    1,226.37x = 1,624,300.36
  5. Step 5: Solve for x
    x = 1,624,300.36/1,226.37
  6. Step 6: Final answer
    x = 1,324.48

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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.