Home / 1,208.28-1,812.27-386.57

Finding the Fourth Proportional to 1,208.28, 1,812.27 and 386.57

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Solution

The fourth proportional to 1,208.28, 1,812.27 and 386.57 is: 579.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.28 : 1,812.27 = 386.57 : x
  2. Step 2: Convert to fraction form
    1,208.28/1,812.27 = 386.57/x
  3. Step 3: Cross multiply
    1,208.28x = 1,812.27 × 386.57
  4. Step 4: Simplify right side
    1,208.28x = 700,569.21
  5. Step 5: Solve for x
    x = 700,569.21/1,208.28
  6. Step 6: Final answer
    x = 579.81

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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.