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Finding the Fourth Proportional to 620,229.05, 856,008.65 and 378,651.66

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Solution

The fourth proportional to 620,229.05, 856,008.65 and 378,651.66 is: 522,595.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,229.05 : 856,008.65 = 378,651.66 : x
  2. Step 2: Convert to fraction form
    620,229.05/856,008.65 = 378,651.66/x
  3. Step 3: Cross multiply
    620,229.05x = 856,008.65 × 378,651.66
  4. Step 4: Simplify right side
    620,229.05x = 324,129,095,823.54
  5. Step 5: Solve for x
    x = 324,129,095,823.54/620,229.05
  6. Step 6: Final answer
    x = 522,595.80

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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.