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Finding the Fourth Proportional to 499,645.05, 689,735.34 and 318,600.33

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Solution

The fourth proportional to 499,645.05, 689,735.34 and 318,600.33 is: 439,812.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,645.05 : 689,735.34 = 318,600.33 : x
  2. Step 2: Convert to fraction form
    499,645.05/689,735.34 = 318,600.33/x
  3. Step 3: Cross multiply
    499,645.05x = 689,735.34 × 318,600.33
  4. Step 4: Simplify right side
    499,645.05x = 219,749,906,936.66
  5. Step 5: Solve for x
    x = 219,749,906,936.66/499,645.05
  6. Step 6: Final answer
    x = 439,812.04

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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.