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Finding the Fourth Proportional to 1,391.48, 2,084.48 and 1,305.37

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Solution

The fourth proportional to 1,391.48, 2,084.48 and 1,305.37 is: 1,955.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.48 : 2,084.48 = 1,305.37 : x
  2. Step 2: Convert to fraction form
    1,391.48/2,084.48 = 1,305.37/x
  3. Step 3: Cross multiply
    1,391.48x = 2,084.48 × 1,305.37
  4. Step 4: Simplify right side
    1,391.48x = 2,721,014.25
  5. Step 5: Solve for x
    x = 2,721,014.25/1,391.48
  6. Step 6: Final answer
    x = 1,955.48

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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.