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Finding the Fourth Proportional to 290,874.64, 436,321.50 and 80,494.96

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Solution

The fourth proportional to 290,874.64, 436,321.50 and 80,494.96 is: 120,745.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,874.64 : 436,321.50 = 80,494.96 : x
  2. Step 2: Convert to fraction form
    290,874.64/436,321.50 = 80,494.96/x
  3. Step 3: Cross multiply
    290,874.64x = 436,321.50 × 80,494.96
  4. Step 4: Simplify right side
    290,874.64x = 35,121,681,689.64
  5. Step 5: Solve for x
    x = 35,121,681,689.64/290,874.64
  6. Step 6: Final answer
    x = 120,745.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.