Home / 2,980.08-4,111.31-1,917.65

Finding the Fourth Proportional to 2,980.08, 4,111.31 and 1,917.65

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Solution

The fourth proportional to 2,980.08, 4,111.31 and 1,917.65 is: 2,645.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.08 : 4,111.31 = 1,917.65 : x
  2. Step 2: Convert to fraction form
    2,980.08/4,111.31 = 1,917.65/x
  3. Step 3: Cross multiply
    2,980.08x = 4,111.31 × 1,917.65
  4. Step 4: Simplify right side
    2,980.08x = 7,884,023.48
  5. Step 5: Solve for x
    x = 7,884,023.48/2,980.08
  6. Step 6: Final answer
    x = 2,645.57

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1.5x scale

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.