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Finding the Fourth Proportional to 4,971.72, 7,454.34 and 1,639.56

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Solution

The fourth proportional to 4,971.72, 7,454.34 and 1,639.56 is: 2,458.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,971.72 : 7,454.34 = 1,639.56 : x
  2. Step 2: Convert to fraction form
    4,971.72/7,454.34 = 1,639.56/x
  3. Step 3: Cross multiply
    4,971.72x = 7,454.34 × 1,639.56
  4. Step 4: Simplify right side
    4,971.72x = 12,221,837.69
  5. Step 5: Solve for x
    x = 12,221,837.69/4,971.72
  6. Step 6: Final answer
    x = 2,458.27

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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.