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Finding the Fourth Proportional to 5,218.56, 7,828.74 and 1,755

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Solution

The fourth proportional to 5,218.56, 7,828.74 and 1,755 is: 2,632.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.56 : 7,828.74 = 1,755 : x
  2. Step 2: Convert to fraction form
    5,218.56/7,828.74 = 1,755/x
  3. Step 3: Cross multiply
    5,218.56x = 7,828.74 × 1,755
  4. Step 4: Simplify right side
    5,218.56x = 13,739,438.70
  5. Step 5: Solve for x
    x = 13,739,438.70/5,218.56
  6. Step 6: Final answer
    x = 2,632.80

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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.