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Finding the Fourth Proportional to 290,999.20, 436,268.40 and 159,671.20

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Solution

The fourth proportional to 290,999.20, 436,268.40 and 159,671.20 is: 239,380.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,999.20 : 436,268.40 = 159,671.20 : x
  2. Step 2: Convert to fraction form
    290,999.20/436,268.40 = 159,671.20/x
  3. Step 3: Cross multiply
    290,999.20x = 436,268.40 × 159,671.20
  4. Step 4: Simplify right side
    290,999.20x = 69,659,498,950.08
  5. Step 5: Solve for x
    x = 69,659,498,950.08/290,999.20
  6. Step 6: Final answer
    x = 239,380.38

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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.