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Finding the Fourth Proportional to 319,511.34, 441,072.42 and 275,729.73

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Solution

The fourth proportional to 319,511.34, 441,072.42 and 275,729.73 is: 380,633.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,511.34 : 441,072.42 = 275,729.73 : x
  2. Step 2: Convert to fraction form
    319,511.34/441,072.42 = 275,729.73/x
  3. Step 3: Cross multiply
    319,511.34x = 441,072.42 × 275,729.73
  4. Step 4: Simplify right side
    319,511.34x = 121,616,779,277.05
  5. Step 5: Solve for x
    x = 121,616,779,277.05/319,511.34
  6. Step 6: Final answer
    x = 380,633.69

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1.5x scale

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.