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Finding the Fourth Proportional to 290,638.56, 401,129.38 and 169,779.44

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Solution

The fourth proportional to 290,638.56, 401,129.38 and 169,779.44 is: 234,323.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,638.56 : 401,129.38 = 169,779.44 : x
  2. Step 2: Convert to fraction form
    290,638.56/401,129.38 = 169,779.44/x
  3. Step 3: Cross multiply
    290,638.56x = 401,129.38 × 169,779.44
  4. Step 4: Simplify right side
    290,638.56x = 68,103,521,503.95
  5. Step 5: Solve for x
    x = 68,103,521,503.95/290,638.56
  6. Step 6: Final answer
    x = 234,323.76

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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.