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Finding the Fourth Proportional to 505,273.36, 697,276.56 and 278,918.32

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Solution

The fourth proportional to 505,273.36, 697,276.56 and 278,918.32 is: 384,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,273.36 : 697,276.56 = 278,918.32 : x
  2. Step 2: Convert to fraction form
    505,273.36/697,276.56 = 278,918.32/x
  3. Step 3: Cross multiply
    505,273.36x = 697,276.56 × 278,918.32
  4. Step 4: Simplify right side
    505,273.36x = 194,483,206,690.58
  5. Step 5: Solve for x
    x = 194,483,206,690.58/505,273.36
  6. Step 6: Final answer
    x = 384,906.91

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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.