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Finding the Fourth Proportional to 2,978.94, 4,110.99 and 1,800.06

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Solution

The fourth proportional to 2,978.94, 4,110.99 and 1,800.06 is: 2,484.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978.94 : 4,110.99 = 1,800.06 : x
  2. Step 2: Convert to fraction form
    2,978.94/4,110.99 = 1,800.06/x
  3. Step 3: Cross multiply
    2,978.94x = 4,110.99 × 1,800.06
  4. Step 4: Simplify right side
    2,978.94x = 7,400,028.66
  5. Step 5: Solve for x
    x = 7,400,028.66/2,978.94
  6. Step 6: Final answer
    x = 2,484.11

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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.