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Finding the Fourth Proportional to 2,940.40, 4,414.20 and 2,918.80

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Solution

The fourth proportional to 2,940.40, 4,414.20 and 2,918.80 is: 4,381.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.40 : 4,414.20 = 2,918.80 : x
  2. Step 2: Convert to fraction form
    2,940.40/4,414.20 = 2,918.80/x
  3. Step 3: Cross multiply
    2,940.40x = 4,414.20 × 2,918.80
  4. Step 4: Simplify right side
    2,940.40x = 12,884,166.96
  5. Step 5: Solve for x
    x = 12,884,166.96/2,940.40
  6. Step 6: Final answer
    x = 4,381.77

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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.