Home / 1,413.12-2,120.91-755.52

Finding the Fourth Proportional to 1,413.12, 2,120.91 and 755.52

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Solution

The fourth proportional to 1,413.12, 2,120.91 and 755.52 is: 1,133.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.12 : 2,120.91 = 755.52 : x
  2. Step 2: Convert to fraction form
    1,413.12/2,120.91 = 755.52/x
  3. Step 3: Cross multiply
    1,413.12x = 2,120.91 × 755.52
  4. Step 4: Simplify right side
    1,413.12x = 1,602,389.92
  5. Step 5: Solve for x
    x = 1,602,389.92/1,413.12
  6. Step 6: Final answer
    x = 1,133.94

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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.