Home / 1,318.36-1,976.87-440.55

Finding the Fourth Proportional to 1,318.36, 1,976.87 and 440.55

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Solution

The fourth proportional to 1,318.36, 1,976.87 and 440.55 is: 660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.36 : 1,976.87 = 440.55 : x
  2. Step 2: Convert to fraction form
    1,318.36/1,976.87 = 440.55/x
  3. Step 3: Cross multiply
    1,318.36x = 1,976.87 × 440.55
  4. Step 4: Simplify right side
    1,318.36x = 870,910.08
  5. Step 5: Solve for x
    x = 870,910.08/1,318.36
  6. Step 6: Final answer
    x = 660.60

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1.5x scale

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.