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Finding the Fourth Proportional to 3,108, 4,663.40 and 1,646.82

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Solution

The fourth proportional to 3,108, 4,663.40 and 1,646.82 is: 2,470.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108 : 4,663.40 = 1,646.82 : x
  2. Step 2: Convert to fraction form
    3,108/4,663.40 = 1,646.82/x
  3. Step 3: Cross multiply
    3,108x = 4,663.40 × 1,646.82
  4. Step 4: Simplify right side
    3,108x = 7,679,772.15
  5. Step 5: Solve for x
    x = 7,679,772.15/3,108
  6. Step 6: Final answer
    x = 2,470.97

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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.