Home / 1,318.09-1,976.91-440.51

Finding the Fourth Proportional to 1,318.09, 1,976.91 and 440.51

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Solution

The fourth proportional to 1,318.09, 1,976.91 and 440.51 is: 660.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.09 : 1,976.91 = 440.51 : x
  2. Step 2: Convert to fraction form
    1,318.09/1,976.91 = 440.51/x
  3. Step 3: Cross multiply
    1,318.09x = 1,976.91 × 440.51
  4. Step 4: Simplify right side
    1,318.09x = 870,837.09
  5. Step 5: Solve for x
    x = 870,837.09/1,318.09
  6. Step 6: Final answer
    x = 660.68

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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.