Home / 1,917.93-2,646.80-1,078.59

Finding the Fourth Proportional to 1,917.93, 2,646.80 and 1,078.59

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Solution

The fourth proportional to 1,917.93, 2,646.80 and 1,078.59 is: 1,488.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.93 : 2,646.80 = 1,078.59 : x
  2. Step 2: Convert to fraction form
    1,917.93/2,646.80 = 1,078.59/x
  3. Step 3: Cross multiply
    1,917.93x = 2,646.80 × 1,078.59
  4. Step 4: Simplify right side
    1,917.93x = 2,854,816.18
  5. Step 5: Solve for x
    x = 2,854,816.18/1,917.93
  6. Step 6: Final answer
    x = 1,488.49

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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.