Home / 1,413.42-2,120.14-929.54

Finding the Fourth Proportional to 1,413.42, 2,120.14 and 929.54

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Solution

The fourth proportional to 1,413.42, 2,120.14 and 929.54 is: 1,394.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.42 : 2,120.14 = 929.54 : x
  2. Step 2: Convert to fraction form
    1,413.42/2,120.14 = 929.54/x
  3. Step 3: Cross multiply
    1,413.42x = 2,120.14 × 929.54
  4. Step 4: Simplify right side
    1,413.42x = 1,970,761.40
  5. Step 5: Solve for x
    x = 1,970,761.40/1,413.42
  6. Step 6: Final answer
    x = 1,394.32

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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.