Home / 1,413.20-2,119.56-439.16

Finding the Fourth Proportional to 1,413.20, 2,119.56 and 439.16

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Solution

The fourth proportional to 1,413.20, 2,119.56 and 439.16 is: 658.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.20 : 2,119.56 = 439.16 : x
  2. Step 2: Convert to fraction form
    1,413.20/2,119.56 = 439.16/x
  3. Step 3: Cross multiply
    1,413.20x = 2,119.56 × 439.16
  4. Step 4: Simplify right side
    1,413.20x = 930,825.97
  5. Step 5: Solve for x
    x = 930,825.97/1,413.20
  6. Step 6: Final answer
    x = 658.67

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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.