Home / 1,413.12-2,119.95-488.70

Finding the Fourth Proportional to 1,413.12, 2,119.95 and 488.70

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Solution

The fourth proportional to 1,413.12, 2,119.95 and 488.70 is: 733.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.12 : 2,119.95 = 488.70 : x
  2. Step 2: Convert to fraction form
    1,413.12/2,119.95 = 488.70/x
  3. Step 3: Cross multiply
    1,413.12x = 2,119.95 × 488.70
  4. Step 4: Simplify right side
    1,413.12x = 1,036,019.57
  5. Step 5: Solve for x
    x = 1,036,019.57/1,413.12
  6. Step 6: Final answer
    x = 733.14

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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.