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Finding the Fourth Proportional to 2,970.71, 4,099.74 and 1,644.47

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Solution

The fourth proportional to 2,970.71, 4,099.74 and 1,644.47 is: 2,269.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,970.71 : 4,099.74 = 1,644.47 : x
  2. Step 2: Convert to fraction form
    2,970.71/4,099.74 = 1,644.47/x
  3. Step 3: Cross multiply
    2,970.71x = 4,099.74 × 1,644.47
  4. Step 4: Simplify right side
    2,970.71x = 6,741,899.44
  5. Step 5: Solve for x
    x = 6,741,899.44/2,970.71
  6. Step 6: Final answer
    x = 2,269.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.