Home / 1,912.02-2,638.56-1,072.80

Finding the Fourth Proportional to 1,912.02, 2,638.56 and 1,072.80

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Solution

The fourth proportional to 1,912.02, 2,638.56 and 1,072.80 is: 1,480.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.02 : 2,638.56 = 1,072.80 : x
  2. Step 2: Convert to fraction form
    1,912.02/2,638.56 = 1,072.80/x
  3. Step 3: Cross multiply
    1,912.02x = 2,638.56 × 1,072.80
  4. Step 4: Simplify right side
    1,912.02x = 2,830,647.17
  5. Step 5: Solve for x
    x = 2,830,647.17/1,912.02
  6. Step 6: Final answer
    x = 1,480.45

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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.