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Finding the Fourth Proportional to 505,670.32, 697,789.56 and 279,298

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Solution

The fourth proportional to 505,670.32, 697,789.56 and 279,298 is: 385,411.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,670.32 : 697,789.56 = 279,298 : x
  2. Step 2: Convert to fraction form
    505,670.32/697,789.56 = 279,298/x
  3. Step 3: Cross multiply
    505,670.32x = 697,789.56 × 279,298
  4. Step 4: Simplify right side
    505,670.32x = 194,891,228,528.88
  5. Step 5: Solve for x
    x = 194,891,228,528.88/505,670.32
  6. Step 6: Final answer
    x = 385,411.64

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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.