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Finding the Fourth Proportional to 620,469.18, 856,340.03 and 378,891.81

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Solution

The fourth proportional to 620,469.18, 856,340.03 and 378,891.81 is: 522,927.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,469.18 : 856,340.03 = 378,891.81 : x
  2. Step 2: Convert to fraction form
    620,469.18/856,340.03 = 378,891.81/x
  3. Step 3: Cross multiply
    620,469.18x = 856,340.03 × 378,891.81
  4. Step 4: Simplify right side
    620,469.18x = 324,460,224,889.38
  5. Step 5: Solve for x
    x = 324,460,224,889.38/620,469.18
  6. Step 6: Final answer
    x = 522,927.22

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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.