Home / 1,917.12-2,640.96-1,326.64

Finding the Fourth Proportional to 1,917.12, 2,640.96 and 1,326.64

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Solution

The fourth proportional to 1,917.12, 2,640.96 and 1,326.64 is: 1,827.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.12 : 2,640.96 = 1,326.64 : x
  2. Step 2: Convert to fraction form
    1,917.12/2,640.96 = 1,326.64/x
  3. Step 3: Cross multiply
    1,917.12x = 2,640.96 × 1,326.64
  4. Step 4: Simplify right side
    1,917.12x = 3,503,603.17
  5. Step 5: Solve for x
    x = 3,503,603.17/1,917.12
  6. Step 6: Final answer
    x = 1,827.53

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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.