Home / 3,985.26-5,977.89-1,386.78

Finding the Fourth Proportional to 3,985.26, 5,977.89 and 1,386.78

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Solution

The fourth proportional to 3,985.26, 5,977.89 and 1,386.78 is: 2,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.26 : 5,977.89 = 1,386.78 : x
  2. Step 2: Convert to fraction form
    3,985.26/5,977.89 = 1,386.78/x
  3. Step 3: Cross multiply
    3,985.26x = 5,977.89 × 1,386.78
  4. Step 4: Simplify right side
    3,985.26x = 8,290,018.29
  5. Step 5: Solve for x
    x = 8,290,018.29/3,985.26
  6. Step 6: Final answer
    x = 2,080.17

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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.