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Finding the Fourth Proportional to 1,083.67, 1,626.06 and 644.92

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Solution

The fourth proportional to 1,083.67, 1,626.06 and 644.92 is: 967.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.67 : 1,626.06 = 644.92 : x
  2. Step 2: Convert to fraction form
    1,083.67/1,626.06 = 644.92/x
  3. Step 3: Cross multiply
    1,083.67x = 1,626.06 × 644.92
  4. Step 4: Simplify right side
    1,083.67x = 1,048,678.62
  5. Step 5: Solve for x
    x = 1,048,678.62/1,083.67
  6. Step 6: Final answer
    x = 967.71

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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.