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Finding the Fourth Proportional to 505,912.08, 698,131.26 and 279,543

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Solution

The fourth proportional to 505,912.08, 698,131.26 and 279,543 is: 385,754.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,912.08 : 698,131.26 = 279,543 : x
  2. Step 2: Convert to fraction form
    505,912.08/698,131.26 = 279,543/x
  3. Step 3: Cross multiply
    505,912.08x = 698,131.26 × 279,543
  4. Step 4: Simplify right side
    505,912.08x = 195,157,706,814.18
  5. Step 5: Solve for x
    x = 195,157,706,814.18/505,912.08
  6. Step 6: Final answer
    x = 385,754.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.