Home / 1,413.09-2,120.00-439.20

Finding the Fourth Proportional to 1,413.09, 2,120.00 and 439.20

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Solution

The fourth proportional to 1,413.09, 2,120.00 and 439.20 is: 658.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.09 : 2,120.00 = 439.20 : x
  2. Step 2: Convert to fraction form
    1,413.09/2,120.00 = 439.20/x
  3. Step 3: Cross multiply
    1,413.09x = 2,120.00 × 439.20
  4. Step 4: Simplify right side
    1,413.09x = 931,101.80
  5. Step 5: Solve for x
    x = 931,101.80/1,413.09
  6. Step 6: Final answer
    x = 658.91

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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.