Home / 1,318.03-1,976.70-393.34

Finding the Fourth Proportional to 1,318.03, 1,976.70 and 393.34

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Solution

The fourth proportional to 1,318.03, 1,976.70 and 393.34 is: 589.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.03 : 1,976.70 = 393.34 : x
  2. Step 2: Convert to fraction form
    1,318.03/1,976.70 = 393.34/x
  3. Step 3: Cross multiply
    1,318.03x = 1,976.70 × 393.34
  4. Step 4: Simplify right side
    1,318.03x = 777,515.18
  5. Step 5: Solve for x
    x = 777,515.18/1,318.03
  6. Step 6: Final answer
    x = 589.91

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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.