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Finding the Fourth Proportional to 505,893.72, 698,128.38 and 279,534.36

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Solution

The fourth proportional to 505,893.72, 698,128.38 and 279,534.36 is: 385,754.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,893.72 : 698,128.38 = 279,534.36 : x
  2. Step 2: Convert to fraction form
    505,893.72/698,128.38 = 279,534.36/x
  3. Step 3: Cross multiply
    505,893.72x = 698,128.38 × 279,534.36
  4. Step 4: Simplify right side
    505,893.72x = 195,150,869,901.14
  5. Step 5: Solve for x
    x = 195,150,869,901.14/505,893.72
  6. Step 6: Final answer
    x = 385,754.68

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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.