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Finding the Fourth Proportional to 1,938.79, 2,907.76 and 1,244.47

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Solution

The fourth proportional to 1,938.79, 2,907.76 and 1,244.47 is: 1,866.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.79 : 2,907.76 = 1,244.47 : x
  2. Step 2: Convert to fraction form
    1,938.79/2,907.76 = 1,244.47/x
  3. Step 3: Cross multiply
    1,938.79x = 2,907.76 × 1,244.47
  4. Step 4: Simplify right side
    1,938.79x = 3,618,620.09
  5. Step 5: Solve for x
    x = 3,618,620.09/1,938.79
  6. Step 6: Final answer
    x = 1,866.43

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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.