Home / 1,211.05-1,816.43-480.23

Finding the Fourth Proportional to 1,211.05, 1,816.43 and 480.23

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Solution

The fourth proportional to 1,211.05, 1,816.43 and 480.23 is: 720.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.05 : 1,816.43 = 480.23 : x
  2. Step 2: Convert to fraction form
    1,211.05/1,816.43 = 480.23/x
  3. Step 3: Cross multiply
    1,211.05x = 1,816.43 × 480.23
  4. Step 4: Simplify right side
    1,211.05x = 872,299.51
  5. Step 5: Solve for x
    x = 872,299.51/1,211.05
  6. Step 6: Final answer
    x = 720.28

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Double scale
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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.