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Finding the Fourth Proportional to 419,999.50, 629,999.25 and 124,511.50

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Solution

The fourth proportional to 419,999.50, 629,999.25 and 124,511.50 is: 186,767.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,999.50 : 629,999.25 = 124,511.50 : x
  2. Step 2: Convert to fraction form
    419,999.50/629,999.25 = 124,511.50/x
  3. Step 3: Cross multiply
    419,999.50x = 629,999.25 × 124,511.50
  4. Step 4: Simplify right side
    419,999.50x = 78,442,151,616.38
  5. Step 5: Solve for x
    x = 78,442,151,616.38/419,999.50
  6. Step 6: Final answer
    x = 186,767.25

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1.5x scale

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.