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Finding the Fourth Proportional to 479,647.11, 661,914.45 and 261,856.14

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Solution

The fourth proportional to 479,647.11, 661,914.45 and 261,856.14 is: 361,362.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,647.11 : 661,914.45 = 261,856.14 : x
  2. Step 2: Convert to fraction form
    479,647.11/661,914.45 = 261,856.14/x
  3. Step 3: Cross multiply
    479,647.11x = 661,914.45 × 261,856.14
  4. Step 4: Simplify right side
    479,647.11x = 173,326,362,887.22
  5. Step 5: Solve for x
    x = 173,326,362,887.22/479,647.11
  6. Step 6: Final answer
    x = 361,362.26

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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.