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Finding the Fourth Proportional to 505,903.08, 698,118.84 and 279,534

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Solution

The fourth proportional to 505,903.08, 698,118.84 and 279,534 is: 385,741.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,903.08 : 698,118.84 = 279,534 : x
  2. Step 2: Convert to fraction form
    505,903.08/698,118.84 = 279,534/x
  3. Step 3: Cross multiply
    505,903.08x = 698,118.84 × 279,534
  4. Step 4: Simplify right side
    505,903.08x = 195,147,951,820.56
  5. Step 5: Solve for x
    x = 195,147,951,820.56/505,903.08
  6. Step 6: Final answer
    x = 385,741.77

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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.