Home / 2,981.86-4,112.10-1,786.65

Finding the Fourth Proportional to 2,981.86, 4,112.10 and 1,786.65

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Solution

The fourth proportional to 2,981.86, 4,112.10 and 1,786.65 is: 2,463.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.86 : 4,112.10 = 1,786.65 : x
  2. Step 2: Convert to fraction form
    2,981.86/4,112.10 = 1,786.65/x
  3. Step 3: Cross multiply
    2,981.86x = 4,112.10 × 1,786.65
  4. Step 4: Simplify right side
    2,981.86x = 7,346,883.47
  5. Step 5: Solve for x
    x = 7,346,883.47/2,981.86
  6. Step 6: Final answer
    x = 2,463.86

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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.