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Finding the Fourth Proportional to 508,739.83, 702,069.21 and 279,318.26

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Solution

The fourth proportional to 508,739.83, 702,069.21 and 279,318.26 is: 385,463.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,739.83 : 702,069.21 = 279,318.26 : x
  2. Step 2: Convert to fraction form
    508,739.83/702,069.21 = 279,318.26/x
  3. Step 3: Cross multiply
    508,739.83x = 702,069.21 × 279,318.26
  4. Step 4: Simplify right side
    508,739.83x = 196,100,751,891.95
  5. Step 5: Solve for x
    x = 196,100,751,891.95/508,739.83
  6. Step 6: Final answer
    x = 385,463.73

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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.