Home / 1,917.29-2,645.80-1,078.05

Finding the Fourth Proportional to 1,917.29, 2,645.80 and 1,078.05

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Solution

The fourth proportional to 1,917.29, 2,645.80 and 1,078.05 is: 1,487.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.29 : 2,645.80 = 1,078.05 : x
  2. Step 2: Convert to fraction form
    1,917.29/2,645.80 = 1,078.05/x
  3. Step 3: Cross multiply
    1,917.29x = 2,645.80 × 1,078.05
  4. Step 4: Simplify right side
    1,917.29x = 2,852,291.34
  5. Step 5: Solve for x
    x = 2,852,291.34/1,917.29
  6. Step 6: Final answer
    x = 1,487.66

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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.