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Finding the Fourth Proportional to 281,987.88, 389,211.12 and 191,494.68

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Solution

The fourth proportional to 281,987.88, 389,211.12 and 191,494.68 is: 264,308.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,987.88 : 389,211.12 = 191,494.68 : x
  2. Step 2: Convert to fraction form
    281,987.88/389,211.12 = 191,494.68/x
  3. Step 3: Cross multiply
    281,987.88x = 389,211.12 × 191,494.68
  4. Step 4: Simplify right side
    281,987.88x = 74,531,858,876.84
  5. Step 5: Solve for x
    x = 74,531,858,876.84/281,987.88
  6. Step 6: Final answer
    x = 264,308.73

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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.