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Finding the Fourth Proportional to 355,618.92, 490,738.46 and 202,690.25

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Solution

The fourth proportional to 355,618.92, 490,738.46 and 202,690.25 is: 279,703.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,618.92 : 490,738.46 = 202,690.25 : x
  2. Step 2: Convert to fraction form
    355,618.92/490,738.46 = 202,690.25/x
  3. Step 3: Cross multiply
    355,618.92x = 490,738.46 × 202,690.25
  4. Step 4: Simplify right side
    355,618.92x = 99,467,897,674.87
  5. Step 5: Solve for x
    x = 99,467,897,674.87/355,618.92
  6. Step 6: Final answer
    x = 279,703.62

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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.