Home / 1,317.57-1,976.33-393.13

Finding the Fourth Proportional to 1,317.57, 1,976.33 and 393.13

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Solution

The fourth proportional to 1,317.57, 1,976.33 and 393.13 is: 589.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.57 : 1,976.33 = 393.13 : x
  2. Step 2: Convert to fraction form
    1,317.57/1,976.33 = 393.13/x
  3. Step 3: Cross multiply
    1,317.57x = 1,976.33 × 393.13
  4. Step 4: Simplify right side
    1,317.57x = 776,958.07
  5. Step 5: Solve for x
    x = 776,958.07/1,317.57
  6. Step 6: Final answer
    x = 589.69

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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.