Home / 3,988.70-5,983.08-1,391.66

Finding the Fourth Proportional to 3,988.70, 5,983.08 and 1,391.66

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Solution

The fourth proportional to 3,988.70, 5,983.08 and 1,391.66 is: 2,087.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.70 : 5,983.08 = 1,391.66 : x
  2. Step 2: Convert to fraction form
    3,988.70/5,983.08 = 1,391.66/x
  3. Step 3: Cross multiply
    3,988.70x = 5,983.08 × 1,391.66
  4. Step 4: Simplify right side
    3,988.70x = 8,326,413.11
  5. Step 5: Solve for x
    x = 8,326,413.11/3,988.70
  6. Step 6: Final answer
    x = 2,087.50

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1.5x scale

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.