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Finding the Fourth Proportional to 326,803.12, 490,624.48 and 251,970.80

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Solution

The fourth proportional to 326,803.12, 490,624.48 and 251,970.80 is: 378,279.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,803.12 : 490,624.48 = 251,970.80 : x
  2. Step 2: Convert to fraction form
    326,803.12/490,624.48 = 251,970.80/x
  3. Step 3: Cross multiply
    326,803.12x = 490,624.48 × 251,970.80
  4. Step 4: Simplify right side
    326,803.12x = 123,623,042,725.18
  5. Step 5: Solve for x
    x = 123,623,042,725.18/326,803.12
  6. Step 6: Final answer
    x = 378,279.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.