Home / 1,919.13-2,647.63-1,290.06

Finding the Fourth Proportional to 1,919.13, 2,647.63 and 1,290.06

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Solution

The fourth proportional to 1,919.13, 2,647.63 and 1,290.06 is: 1,779.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.13 : 2,647.63 = 1,290.06 : x
  2. Step 2: Convert to fraction form
    1,919.13/2,647.63 = 1,290.06/x
  3. Step 3: Cross multiply
    1,919.13x = 2,647.63 × 1,290.06
  4. Step 4: Simplify right side
    1,919.13x = 3,415,603.17
  5. Step 5: Solve for x
    x = 3,415,603.17/1,919.13
  6. Step 6: Final answer
    x = 1,779.77

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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.