Home / 1,413.24-2,119.76-439.36

Finding the Fourth Proportional to 1,413.24, 2,119.76 and 439.36

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Solution

The fourth proportional to 1,413.24, 2,119.76 and 439.36 is: 659.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.24 : 2,119.76 = 439.36 : x
  2. Step 2: Convert to fraction form
    1,413.24/2,119.76 = 439.36/x
  3. Step 3: Cross multiply
    1,413.24x = 2,119.76 × 439.36
  4. Step 4: Simplify right side
    1,413.24x = 931,337.75
  5. Step 5: Solve for x
    x = 931,337.75/1,413.24
  6. Step 6: Final answer
    x = 659.01

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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.