Home / 1,116.75-1,675.23-386.23

Finding the Fourth Proportional to 1,116.75, 1,675.23 and 386.23

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Solution

The fourth proportional to 1,116.75, 1,675.23 and 386.23 is: 579.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.75 : 1,675.23 = 386.23 : x
  2. Step 2: Convert to fraction form
    1,116.75/1,675.23 = 386.23/x
  3. Step 3: Cross multiply
    1,116.75x = 1,675.23 × 386.23
  4. Step 4: Simplify right side
    1,116.75x = 647,015.71
  5. Step 5: Solve for x
    x = 647,015.71/1,116.75
  6. Step 6: Final answer
    x = 579.38

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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.