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Finding the Fourth Proportional to 355,735.21, 491,039.67 and 219,873.37

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Solution

The fourth proportional to 355,735.21, 491,039.67 and 219,873.37 is: 303,502.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,735.21 : 491,039.67 = 219,873.37 : x
  2. Step 2: Convert to fraction form
    355,735.21/491,039.67 = 219,873.37/x
  3. Step 3: Cross multiply
    355,735.21x = 491,039.67 × 219,873.37
  4. Step 4: Simplify right side
    355,735.21x = 107,966,547,046.59
  5. Step 5: Solve for x
    x = 107,966,547,046.59/355,735.21
  6. Step 6: Final answer
    x = 303,502.56

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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.