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Finding the Fourth Proportional to 5,287.24, 7,930.24 and 1,391.95

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Solution

The fourth proportional to 5,287.24, 7,930.24 and 1,391.95 is: 2,087.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.24 : 7,930.24 = 1,391.95 : x
  2. Step 2: Convert to fraction form
    5,287.24/7,930.24 = 1,391.95/x
  3. Step 3: Cross multiply
    5,287.24x = 7,930.24 × 1,391.95
  4. Step 4: Simplify right side
    5,287.24x = 11,038,504.00
  5. Step 5: Solve for x
    x = 11,038,504.00/5,287.24
  6. Step 6: Final answer
    x = 2,087.76

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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.