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Finding the Fourth Proportional to 5,219.72, 7,827.72 and 1,708.88

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Solution

The fourth proportional to 5,219.72, 7,827.72 and 1,708.88 is: 2,562.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,219.72 : 7,827.72 = 1,708.88 : x
  2. Step 2: Convert to fraction form
    5,219.72/7,827.72 = 1,708.88/x
  3. Step 3: Cross multiply
    5,219.72x = 7,827.72 × 1,708.88
  4. Step 4: Simplify right side
    5,219.72x = 13,376,634.15
  5. Step 5: Solve for x
    x = 13,376,634.15/5,219.72
  6. Step 6: Final answer
    x = 2,562.71

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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.