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Finding the Fourth Proportional to 298,673.33, 447,939.24 and 85,434.68

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Solution

The fourth proportional to 298,673.33, 447,939.24 and 85,434.68 is: 128,131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,673.33 : 447,939.24 = 85,434.68 : x
  2. Step 2: Convert to fraction form
    298,673.33/447,939.24 = 85,434.68/x
  3. Step 3: Cross multiply
    298,673.33x = 447,939.24 × 85,434.68
  4. Step 4: Simplify right side
    298,673.33x = 38,269,545,628.84
  5. Step 5: Solve for x
    x = 38,269,545,628.84/298,673.33
  6. Step 6: Final answer
    x = 128,131.78

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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.