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Finding the Fourth Proportional to 505,606.50, 697,736.97 and 279,266.58

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Solution

The fourth proportional to 505,606.50, 697,736.97 and 279,266.58 is: 385,387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,606.50 : 697,736.97 = 279,266.58 : x
  2. Step 2: Convert to fraction form
    505,606.50/697,736.97 = 279,266.58/x
  3. Step 3: Cross multiply
    505,606.50x = 697,736.97 × 279,266.58
  4. Step 4: Simplify right side
    505,606.50x = 194,854,617,351.46
  5. Step 5: Solve for x
    x = 194,854,617,351.46/505,606.50
  6. Step 6: Final answer
    x = 385,387.88

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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.