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Finding the Fourth Proportional to 221,259.40, 331,485.90 and 127,486.60

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Solution

The fourth proportional to 221,259.40, 331,485.90 and 127,486.60 is: 190,997.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,259.40 : 331,485.90 = 127,486.60 : x
  2. Step 2: Convert to fraction form
    221,259.40/331,485.90 = 127,486.60/x
  3. Step 3: Cross multiply
    221,259.40x = 331,485.90 × 127,486.60
  4. Step 4: Simplify right side
    221,259.40x = 42,260,010,338.94
  5. Step 5: Solve for x
    x = 42,260,010,338.94/221,259.40
  6. Step 6: Final answer
    x = 190,997.58

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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.