Home / 1,860.90-2,568.37-1,391.15

Finding the Fourth Proportional to 1,860.90, 2,568.37 and 1,391.15

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Solution

The fourth proportional to 1,860.90, 2,568.37 and 1,391.15 is: 1,920.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.90 : 2,568.37 = 1,391.15 : x
  2. Step 2: Convert to fraction form
    1,860.90/2,568.37 = 1,391.15/x
  3. Step 3: Cross multiply
    1,860.90x = 2,568.37 × 1,391.15
  4. Step 4: Simplify right side
    1,860.90x = 3,572,968.13
  5. Step 5: Solve for x
    x = 3,572,968.13/1,860.90
  6. Step 6: Final answer
    x = 1,920.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.