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Finding the Fourth Proportional to 1,374.73, 2,062.09 and 644.82

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Solution

The fourth proportional to 1,374.73, 2,062.09 and 644.82 is: 967.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.73 : 2,062.09 = 644.82 : x
  2. Step 2: Convert to fraction form
    1,374.73/2,062.09 = 644.82/x
  3. Step 3: Cross multiply
    1,374.73x = 2,062.09 × 644.82
  4. Step 4: Simplify right side
    1,374.73x = 1,329,676.87
  5. Step 5: Solve for x
    x = 1,329,676.87/1,374.73
  6. Step 6: Final answer
    x = 967.23

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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.