Home / 1,917.81-2,646.55-1,078.53

Finding the Fourth Proportional to 1,917.81, 2,646.55 and 1,078.53

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Solution

The fourth proportional to 1,917.81, 2,646.55 and 1,078.53 is: 1,488.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.81 : 2,646.55 = 1,078.53 : x
  2. Step 2: Convert to fraction form
    1,917.81/2,646.55 = 1,078.53/x
  3. Step 3: Cross multiply
    1,917.81x = 2,646.55 × 1,078.53
  4. Step 4: Simplify right side
    1,917.81x = 2,854,383.57
  5. Step 5: Solve for x
    x = 2,854,383.57/1,917.81
  6. Step 6: Final answer
    x = 1,488.36

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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.