Home / 1,310.69-1,965.80-386.23

Finding the Fourth Proportional to 1,310.69, 1,965.80 and 386.23

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Solution

The fourth proportional to 1,310.69, 1,965.80 and 386.23 is: 579.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.69 : 1,965.80 = 386.23 : x
  2. Step 2: Convert to fraction form
    1,310.69/1,965.80 = 386.23/x
  3. Step 3: Cross multiply
    1,310.69x = 1,965.80 × 386.23
  4. Step 4: Simplify right side
    1,310.69x = 759,250.93
  5. Step 5: Solve for x
    x = 759,250.93/1,310.69
  6. Step 6: Final answer
    x = 579.28

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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.