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Finding the Fourth Proportional to 290,689.02, 436,033.73 and 80,327.16

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Solution

The fourth proportional to 290,689.02, 436,033.73 and 80,327.16 is: 120,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,689.02 : 436,033.73 = 80,327.16 : x
  2. Step 2: Convert to fraction form
    290,689.02/436,033.73 = 80,327.16/x
  3. Step 3: Cross multiply
    290,689.02x = 436,033.73 × 80,327.16
  4. Step 4: Simplify right side
    290,689.02x = 35,025,351,195.11
  5. Step 5: Solve for x
    x = 35,025,351,195.11/290,689.02
  6. Step 6: Final answer
    x = 120,490.80

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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.