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Finding the Fourth Proportional to 2,978.88, 4,110.65 and 1,634.28

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Solution

The fourth proportional to 2,978.88, 4,110.65 and 1,634.28 is: 2,255.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978.88 : 4,110.65 = 1,634.28 : x
  2. Step 2: Convert to fraction form
    2,978.88/4,110.65 = 1,634.28/x
  3. Step 3: Cross multiply
    2,978.88x = 4,110.65 × 1,634.28
  4. Step 4: Simplify right side
    2,978.88x = 6,717,935.62
  5. Step 5: Solve for x
    x = 6,717,935.62/2,978.88
  6. Step 6: Final answer
    x = 2,255.19

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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.