Home / 1,208.08-1,812.39-386.29

Finding the Fourth Proportional to 1,208.08, 1,812.39 and 386.29

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Solution

The fourth proportional to 1,208.08, 1,812.39 and 386.29 is: 579.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.08 : 1,812.39 = 386.29 : x
  2. Step 2: Convert to fraction form
    1,208.08/1,812.39 = 386.29/x
  3. Step 3: Cross multiply
    1,208.08x = 1,812.39 × 386.29
  4. Step 4: Simplify right side
    1,208.08x = 700,108.13
  5. Step 5: Solve for x
    x = 700,108.13/1,208.08
  6. Step 6: Final answer
    x = 579.52

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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.