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Finding the Fourth Proportional to 279,189, 385,281 and 158,291.64

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Solution

The fourth proportional to 279,189, 385,281 and 158,291.64 is: 218,442.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,189 : 385,281 = 158,291.64 : x
  2. Step 2: Convert to fraction form
    279,189/385,281 = 158,291.64/x
  3. Step 3: Cross multiply
    279,189x = 385,281 × 158,291.64
  4. Step 4: Simplify right side
    279,189x = 60,986,761,350.84
  5. Step 5: Solve for x
    x = 60,986,761,350.84/279,189
  6. Step 6: Final answer
    x = 218,442.57

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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.