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Finding the Fourth Proportional to 2,188.63, 3,282.94 and 649.63

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Solution

The fourth proportional to 2,188.63, 3,282.94 and 649.63 is: 974.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.63 : 3,282.94 = 649.63 : x
  2. Step 2: Convert to fraction form
    2,188.63/3,282.94 = 649.63/x
  3. Step 3: Cross multiply
    2,188.63x = 3,282.94 × 649.63
  4. Step 4: Simplify right side
    2,188.63x = 2,132,678.27
  5. Step 5: Solve for x
    x = 2,132,678.27/2,188.63
  6. Step 6: Final answer
    x = 974.44

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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.