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Finding the Fourth Proportional to 499,572.89, 689,410.09 and 270,129.62

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Solution

The fourth proportional to 499,572.89, 689,410.09 and 270,129.62 is: 372,778.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,572.89 : 689,410.09 = 270,129.62 : x
  2. Step 2: Convert to fraction form
    499,572.89/689,410.09 = 270,129.62/x
  3. Step 3: Cross multiply
    499,572.89x = 689,410.09 × 270,129.62
  4. Step 4: Simplify right side
    499,572.89x = 186,230,087,697.05
  5. Step 5: Solve for x
    x = 186,230,087,697.05/499,572.89
  6. Step 6: Final answer
    x = 372,778.61

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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.