Home / 1,911.82-2,639.03-1,645.28

Finding the Fourth Proportional to 1,911.82, 2,639.03 and 1,645.28

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Solution

The fourth proportional to 1,911.82, 2,639.03 and 1,645.28 is: 2,271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.82 : 2,639.03 = 1,645.28 : x
  2. Step 2: Convert to fraction form
    1,911.82/2,639.03 = 1,645.28/x
  3. Step 3: Cross multiply
    1,911.82x = 2,639.03 × 1,645.28
  4. Step 4: Simplify right side
    1,911.82x = 4,341,941.01
  5. Step 5: Solve for x
    x = 4,341,941.01/1,911.82
  6. Step 6: Final answer
    x = 2,271.10

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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.