Home / 2,979.60-4,111.62-1,720.08

Finding the Fourth Proportional to 2,979.60, 4,111.62 and 1,720.08

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Solution

The fourth proportional to 2,979.60, 4,111.62 and 1,720.08 is: 2,373.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.60 : 4,111.62 = 1,720.08 : x
  2. Step 2: Convert to fraction form
    2,979.60/4,111.62 = 1,720.08/x
  3. Step 3: Cross multiply
    2,979.60x = 4,111.62 × 1,720.08
  4. Step 4: Simplify right side
    2,979.60x = 7,072,315.33
  5. Step 5: Solve for x
    x = 7,072,315.33/2,979.60
  6. Step 6: Final answer
    x = 2,373.58

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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.