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Finding the Fourth Proportional to 505,613, 697,745.94 and 279,273.08

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Solution

The fourth proportional to 505,613, 697,745.94 and 279,273.08 is: 385,396.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,613 : 697,745.94 = 279,273.08 : x
  2. Step 2: Convert to fraction form
    505,613/697,745.94 = 279,273.08/x
  3. Step 3: Cross multiply
    505,613x = 697,745.94 × 279,273.08
  4. Step 4: Simplify right side
    505,613x = 194,861,657,721.30
  5. Step 5: Solve for x
    x = 194,861,657,721.30/505,613
  6. Step 6: Final answer
    x = 385,396.85

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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.