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Finding the Fourth Proportional to 505,845.12, 698,064.84 and 279,489

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Solution

The fourth proportional to 505,845.12, 698,064.84 and 279,489 is: 385,694.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,845.12 : 698,064.84 = 279,489 : x
  2. Step 2: Convert to fraction form
    505,845.12/698,064.84 = 279,489/x
  3. Step 3: Cross multiply
    505,845.12x = 698,064.84 × 279,489
  4. Step 4: Simplify right side
    505,845.12x = 195,101,444,066.76
  5. Step 5: Solve for x
    x = 195,101,444,066.76/505,845.12
  6. Step 6: Final answer
    x = 385,694.03

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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.