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Finding the Fourth Proportional to 505,691.64, 697,795.02 and 279,323.64

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Solution

The fourth proportional to 505,691.64, 697,795.02 and 279,323.64 is: 385,433.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,691.64 : 697,795.02 = 279,323.64 : x
  2. Step 2: Convert to fraction form
    505,691.64/697,795.02 = 279,323.64/x
  3. Step 3: Cross multiply
    505,691.64x = 697,795.02 × 279,323.64
  4. Step 4: Simplify right side
    505,691.64x = 194,910,644,960.27
  5. Step 5: Solve for x
    x = 194,910,644,960.27/505,691.64
  6. Step 6: Final answer
    x = 385,433.79

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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.