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Finding the Fourth Proportional to 505,405.44, 697,464.72 and 279,050.40

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Solution

The fourth proportional to 505,405.44, 697,464.72 and 279,050.40 is: 385,092.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,405.44 : 697,464.72 = 279,050.40 : x
  2. Step 2: Convert to fraction form
    505,405.44/697,464.72 = 279,050.40/x
  3. Step 3: Cross multiply
    505,405.44x = 697,464.72 × 279,050.40
  4. Step 4: Simplify right side
    505,405.44x = 194,627,809,101.89
  5. Step 5: Solve for x
    x = 194,627,809,101.89/505,405.44
  6. Step 6: Final answer
    x = 385,092.43

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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.