Home / 1,210.96-1,815.81-480.16

Finding the Fourth Proportional to 1,210.96, 1,815.81 and 480.16

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Solution

The fourth proportional to 1,210.96, 1,815.81 and 480.16 is: 719.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.96 : 1,815.81 = 480.16 : x
  2. Step 2: Convert to fraction form
    1,210.96/1,815.81 = 480.16/x
  3. Step 3: Cross multiply
    1,210.96x = 1,815.81 × 480.16
  4. Step 4: Simplify right side
    1,210.96x = 871,879.33
  5. Step 5: Solve for x
    x = 871,879.33/1,210.96
  6. Step 6: Final answer
    x = 719.99

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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.