Home / 2,980.18-4,112.64-1,785.38

Finding the Fourth Proportional to 2,980.18, 4,112.64 and 1,785.38

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Solution

The fourth proportional to 2,980.18, 4,112.64 and 1,785.38 is: 2,463.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.18 : 4,112.64 = 1,785.38 : x
  2. Step 2: Convert to fraction form
    2,980.18/4,112.64 = 1,785.38/x
  3. Step 3: Cross multiply
    2,980.18x = 4,112.64 × 1,785.38
  4. Step 4: Simplify right side
    2,980.18x = 7,342,625.20
  5. Step 5: Solve for x
    x = 7,342,625.20/2,980.18
  6. Step 6: Final answer
    x = 2,463.82

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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.