Home / 2,151.36-3,226.80-918.96

Finding the Fourth Proportional to 2,151.36, 3,226.80 and 918.96

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Solution

The fourth proportional to 2,151.36, 3,226.80 and 918.96 is: 1,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.36 : 3,226.80 = 918.96 : x
  2. Step 2: Convert to fraction form
    2,151.36/3,226.80 = 918.96/x
  3. Step 3: Cross multiply
    2,151.36x = 3,226.80 × 918.96
  4. Step 4: Simplify right side
    2,151.36x = 2,965,300.13
  5. Step 5: Solve for x
    x = 2,965,300.13/2,151.36
  6. Step 6: Final answer
    x = 1,378.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.