Home / 3,987.38-5,980.61-1,065.92

Finding the Fourth Proportional to 3,987.38, 5,980.61 and 1,065.92

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Solution

The fourth proportional to 3,987.38, 5,980.61 and 1,065.92 is: 1,598.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.38 : 5,980.61 = 1,065.92 : x
  2. Step 2: Convert to fraction form
    3,987.38/5,980.61 = 1,065.92/x
  3. Step 3: Cross multiply
    3,987.38x = 5,980.61 × 1,065.92
  4. Step 4: Simplify right side
    3,987.38x = 6,374,816.58
  5. Step 5: Solve for x
    x = 6,374,816.58/3,987.38
  6. Step 6: Final answer
    x = 1,598.75

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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.