Home / 1,413.90-2,122.20-1,208.70

Finding the Fourth Proportional to 1,413.90, 2,122.20 and 1,208.70

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Solution

The fourth proportional to 1,413.90, 2,122.20 and 1,208.70 is: 1,814.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.90 : 2,122.20 = 1,208.70 : x
  2. Step 2: Convert to fraction form
    1,413.90/2,122.20 = 1,208.70/x
  3. Step 3: Cross multiply
    1,413.90x = 2,122.20 × 1,208.70
  4. Step 4: Simplify right side
    1,413.90x = 2,565,103.14
  5. Step 5: Solve for x
    x = 2,565,103.14/1,413.90
  6. Step 6: Final answer
    x = 1,814.20

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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.