Home / 1,912.48-2,636.80-1,381.12

Finding the Fourth Proportional to 1,912.48, 2,636.80 and 1,381.12

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Solution

The fourth proportional to 1,912.48, 2,636.80 and 1,381.12 is: 1,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.48 : 2,636.80 = 1,381.12 : x
  2. Step 2: Convert to fraction form
    1,912.48/2,636.80 = 1,381.12/x
  3. Step 3: Cross multiply
    1,912.48x = 2,636.80 × 1,381.12
  4. Step 4: Simplify right side
    1,912.48x = 3,641,737.22
  5. Step 5: Solve for x
    x = 3,641,737.22/1,912.48
  6. Step 6: Final answer
    x = 1,904.20

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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.