Home / 1,310.49-1,965.70-386.02

Finding the Fourth Proportional to 1,310.49, 1,965.70 and 386.02

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Solution

The fourth proportional to 1,310.49, 1,965.70 and 386.02 is: 579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.49 : 1,965.70 = 386.02 : x
  2. Step 2: Convert to fraction form
    1,310.49/1,965.70 = 386.02/x
  3. Step 3: Cross multiply
    1,310.49x = 1,965.70 × 386.02
  4. Step 4: Simplify right side
    1,310.49x = 758,799.51
  5. Step 5: Solve for x
    x = 758,799.51/1,310.49
  6. Step 6: Final answer
    x = 579.02

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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.