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Finding the Fourth Proportional to 505,992, 698,259.60 and 279,632.64

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Solution

The fourth proportional to 505,992, 698,259.60 and 279,632.64 is: 385,887.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,992 : 698,259.60 = 279,632.64 : x
  2. Step 2: Convert to fraction form
    505,992/698,259.60 = 279,632.64/x
  3. Step 3: Cross multiply
    505,992x = 698,259.60 × 279,632.64
  4. Step 4: Simplify right side
    505,992x = 195,256,175,353.34
  5. Step 5: Solve for x
    x = 195,256,175,353.34/505,992
  6. Step 6: Final answer
    x = 385,887.87

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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.