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Finding the Fourth Proportional to 505,644.36, 697,784.76 and 279,285

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Solution

The fourth proportional to 505,644.36, 697,784.76 and 279,285 is: 385,410.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,644.36 : 697,784.76 = 279,285 : x
  2. Step 2: Convert to fraction form
    505,644.36/697,784.76 = 279,285/x
  3. Step 3: Cross multiply
    505,644.36x = 697,784.76 × 279,285
  4. Step 4: Simplify right side
    505,644.36x = 194,880,816,696.60
  5. Step 5: Solve for x
    x = 194,880,816,696.60/505,644.36
  6. Step 6: Final answer
    x = 385,410.84

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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.