Home / 3,990.57-5,985.78-1,068.85

Finding the Fourth Proportional to 3,990.57, 5,985.78 and 1,068.85

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Solution

The fourth proportional to 3,990.57, 5,985.78 and 1,068.85 is: 1,603.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.57 : 5,985.78 = 1,068.85 : x
  2. Step 2: Convert to fraction form
    3,990.57/5,985.78 = 1,068.85/x
  3. Step 3: Cross multiply
    3,990.57x = 5,985.78 × 1,068.85
  4. Step 4: Simplify right side
    3,990.57x = 6,397,900.95
  5. Step 5: Solve for x
    x = 6,397,900.95/3,990.57
  6. Step 6: Final answer
    x = 1,603.25

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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.