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Finding the Fourth Proportional to 355,568.82, 490,644.78 and 210,379.06

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Solution

The fourth proportional to 355,568.82, 490,644.78 and 210,379.06 is: 290,299.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,568.82 : 490,644.78 = 210,379.06 : x
  2. Step 2: Convert to fraction form
    355,568.82/490,644.78 = 210,379.06/x
  3. Step 3: Cross multiply
    355,568.82x = 490,644.78 × 210,379.06
  4. Step 4: Simplify right side
    355,568.82x = 103,221,387,610.31
  5. Step 5: Solve for x
    x = 103,221,387,610.31/355,568.82
  6. Step 6: Final answer
    x = 290,299.32

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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.