Home / 1,413.14-2,120.39-547.25

Finding the Fourth Proportional to 1,413.14, 2,120.39 and 547.25

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Solution

The fourth proportional to 1,413.14, 2,120.39 and 547.25 is: 821.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.14 : 2,120.39 = 547.25 : x
  2. Step 2: Convert to fraction form
    1,413.14/2,120.39 = 547.25/x
  3. Step 3: Cross multiply
    1,413.14x = 2,120.39 × 547.25
  4. Step 4: Simplify right side
    1,413.14x = 1,160,383.43
  5. Step 5: Solve for x
    x = 1,160,383.43/1,413.14
  6. Step 6: Final answer
    x = 821.14

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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.