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Finding the Fourth Proportional to 355,209.59, 490,188.96 and 202,239.87

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Solution

The fourth proportional to 355,209.59, 490,188.96 and 202,239.87 is: 279,090.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,209.59 : 490,188.96 = 202,239.87 : x
  2. Step 2: Convert to fraction form
    355,209.59/490,188.96 = 202,239.87/x
  3. Step 3: Cross multiply
    355,209.59x = 490,188.96 × 202,239.87
  4. Step 4: Simplify right side
    355,209.59x = 99,135,751,545.84
  5. Step 5: Solve for x
    x = 99,135,751,545.84/355,209.59
  6. Step 6: Final answer
    x = 279,090.87

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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.