Home / 1,413.52-2,120.58-439.59

Finding the Fourth Proportional to 1,413.52, 2,120.58 and 439.59

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Solution

The fourth proportional to 1,413.52, 2,120.58 and 439.59 is: 659.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.52 : 2,120.58 = 439.59 : x
  2. Step 2: Convert to fraction form
    1,413.52/2,120.58 = 439.59/x
  3. Step 3: Cross multiply
    1,413.52x = 2,120.58 × 439.59
  4. Step 4: Simplify right side
    1,413.52x = 932,193.71
  5. Step 5: Solve for x
    x = 932,193.71/1,413.52
  6. Step 6: Final answer
    x = 659.49

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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.