Home / 1,938.60-2,905.02-1,872.36

Finding the Fourth Proportional to 1,938.60, 2,905.02 and 1,872.36

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Solution

The fourth proportional to 1,938.60, 2,905.02 and 1,872.36 is: 2,805.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.60 : 2,905.02 = 1,872.36 : x
  2. Step 2: Convert to fraction form
    1,938.60/2,905.02 = 1,872.36/x
  3. Step 3: Cross multiply
    1,938.60x = 2,905.02 × 1,872.36
  4. Step 4: Simplify right side
    1,938.60x = 5,439,243.25
  5. Step 5: Solve for x
    x = 5,439,243.25/1,938.60
  6. Step 6: Final answer
    x = 2,805.76

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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.