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Finding the Fourth Proportional to 2,108.63, 3,162.36 and 646.97

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Solution

The fourth proportional to 2,108.63, 3,162.36 and 646.97 is: 970.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.63 : 3,162.36 = 646.97 : x
  2. Step 2: Convert to fraction form
    2,108.63/3,162.36 = 646.97/x
  3. Step 3: Cross multiply
    2,108.63x = 3,162.36 × 646.97
  4. Step 4: Simplify right side
    2,108.63x = 2,045,952.05
  5. Step 5: Solve for x
    x = 2,045,952.05/2,108.63
  6. Step 6: Final answer
    x = 970.28

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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.