Home / 1,917.79-2,646.49-1,078.47

Finding the Fourth Proportional to 1,917.79, 2,646.49 and 1,078.47

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Solution

The fourth proportional to 1,917.79, 2,646.49 and 1,078.47 is: 1,488.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.79 : 2,646.49 = 1,078.47 : x
  2. Step 2: Convert to fraction form
    1,917.79/2,646.49 = 1,078.47/x
  3. Step 3: Cross multiply
    1,917.79x = 2,646.49 × 1,078.47
  4. Step 4: Simplify right side
    1,917.79x = 2,854,160.07
  5. Step 5: Solve for x
    x = 2,854,160.07/1,917.79
  6. Step 6: Final answer
    x = 1,488.25

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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.