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Finding the Fourth Proportional to 505,820.88, 698,024.50 and 279,487.44

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Solution

The fourth proportional to 505,820.88, 698,024.50 and 279,487.44 is: 385,688.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,820.88 : 698,024.50 = 279,487.44 : x
  2. Step 2: Convert to fraction form
    505,820.88/698,024.50 = 279,487.44/x
  3. Step 3: Cross multiply
    505,820.88x = 698,024.50 × 279,487.44
  4. Step 4: Simplify right side
    505,820.88x = 195,089,080,562.28
  5. Step 5: Solve for x
    x = 195,089,080,562.28/505,820.88
  6. Step 6: Final answer
    x = 385,688.07

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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.