Home / 1,413.30-2,119.93-439.47

Finding the Fourth Proportional to 1,413.30, 2,119.93 and 439.47

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Solution

The fourth proportional to 1,413.30, 2,119.93 and 439.47 is: 659.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.30 : 2,119.93 = 439.47 : x
  2. Step 2: Convert to fraction form
    1,413.30/2,119.93 = 439.47/x
  3. Step 3: Cross multiply
    1,413.30x = 2,119.93 × 439.47
  4. Step 4: Simplify right side
    1,413.30x = 931,645.64
  5. Step 5: Solve for x
    x = 931,645.64/1,413.30
  6. Step 6: Final answer
    x = 659.20

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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.