Home / 1,911.81-2,638.84-1,126.31

Finding the Fourth Proportional to 1,911.81, 2,638.84 and 1,126.31

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Solution

The fourth proportional to 1,911.81, 2,638.84 and 1,126.31 is: 1,554.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.81 : 2,638.84 = 1,126.31 : x
  2. Step 2: Convert to fraction form
    1,911.81/2,638.84 = 1,126.31/x
  3. Step 3: Cross multiply
    1,911.81x = 2,638.84 × 1,126.31
  4. Step 4: Simplify right side
    1,911.81x = 2,972,155.66
  5. Step 5: Solve for x
    x = 2,972,155.66/1,911.81
  6. Step 6: Final answer
    x = 1,554.63

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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.