Home / 1,413.70-2,120.55-976.30

Finding the Fourth Proportional to 1,413.70, 2,120.55 and 976.30

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Solution

The fourth proportional to 1,413.70, 2,120.55 and 976.30 is: 1,464.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.70 : 2,120.55 = 976.30 : x
  2. Step 2: Convert to fraction form
    1,413.70/2,120.55 = 976.30/x
  3. Step 3: Cross multiply
    1,413.70x = 2,120.55 × 976.30
  4. Step 4: Simplify right side
    1,413.70x = 2,070,292.97
  5. Step 5: Solve for x
    x = 2,070,292.97/1,413.70
  6. Step 6: Final answer
    x = 1,464.45

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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.