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Finding the Fourth Proportional to 499,370.12, 689,142.96 and 303,138.92

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Solution

The fourth proportional to 499,370.12, 689,142.96 and 303,138.92 is: 418,339.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,370.12 : 689,142.96 = 303,138.92 : x
  2. Step 2: Convert to fraction form
    499,370.12/689,142.96 = 303,138.92/x
  3. Step 3: Cross multiply
    499,370.12x = 689,142.96 × 303,138.92
  4. Step 4: Simplify right side
    499,370.12x = 208,906,052,620.00
  5. Step 5: Solve for x
    x = 208,906,052,620.00/499,370.12
  6. Step 6: Final answer
    x = 418,339.11

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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.