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Finding the Fourth Proportional to 1,413.12, 1,950 and 947.04

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Solution

The fourth proportional to 1,413.12, 1,950 and 947.04 is: 1,306.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.12 : 1,950 = 947.04 : x
  2. Step 2: Convert to fraction form
    1,413.12/1,950 = 947.04/x
  3. Step 3: Cross multiply
    1,413.12x = 1,950 × 947.04
  4. Step 4: Simplify right side
    1,413.12x = 1,846,728
  5. Step 5: Solve for x
    x = 1,846,728/1,413.12
  6. Step 6: Final answer
    x = 1,306.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.