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Finding the Fourth Proportional to 3,339.99, 5,009.18 and 1,391.13

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Solution

The fourth proportional to 3,339.99, 5,009.18 and 1,391.13 is: 2,086.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,339.99 : 5,009.18 = 1,391.13 : x
  2. Step 2: Convert to fraction form
    3,339.99/5,009.18 = 1,391.13/x
  3. Step 3: Cross multiply
    3,339.99x = 5,009.18 × 1,391.13
  4. Step 4: Simplify right side
    3,339.99x = 6,968,413.62
  5. Step 5: Solve for x
    x = 6,968,413.62/3,339.99
  6. Step 6: Final answer
    x = 2,086.36

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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.