Home / 1,413.50-2,120.36-439.61

Finding the Fourth Proportional to 1,413.50, 2,120.36 and 439.61

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Solution

The fourth proportional to 1,413.50, 2,120.36 and 439.61 is: 659.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.50 : 2,120.36 = 439.61 : x
  2. Step 2: Convert to fraction form
    1,413.50/2,120.36 = 439.61/x
  3. Step 3: Cross multiply
    1,413.50x = 2,120.36 × 439.61
  4. Step 4: Simplify right side
    1,413.50x = 932,118.66
  5. Step 5: Solve for x
    x = 932,118.66/1,413.50
  6. Step 6: Final answer
    x = 659.44

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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.