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Finding the Fourth Proportional to 331,163.60, 497,628.60 and 290,021.20

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Solution

The fourth proportional to 331,163.60, 497,628.60 and 290,021.20 is: 435,805.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,163.60 : 497,628.60 = 290,021.20 : x
  2. Step 2: Convert to fraction form
    331,163.60/497,628.60 = 290,021.20/x
  3. Step 3: Cross multiply
    331,163.60x = 497,628.60 × 290,021.20
  4. Step 4: Simplify right side
    331,163.60x = 144,322,843,726.32
  5. Step 5: Solve for x
    x = 144,322,843,726.32/331,163.60
  6. Step 6: Final answer
    x = 435,805.27

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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.