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Finding the Fourth Proportional to 2,412.78, 3,328.05 and 1,914.63

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Solution

The fourth proportional to 2,412.78, 3,328.05 and 1,914.63 is: 2,640.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.78 : 3,328.05 = 1,914.63 : x
  2. Step 2: Convert to fraction form
    2,412.78/3,328.05 = 1,914.63/x
  3. Step 3: Cross multiply
    2,412.78x = 3,328.05 × 1,914.63
  4. Step 4: Simplify right side
    2,412.78x = 6,371,984.37
  5. Step 5: Solve for x
    x = 6,371,984.37/2,412.78
  6. Step 6: Final answer
    x = 2,640.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.