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Finding the Fourth Proportional to 427,622.50, 640,990.83 and 351,947.51

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Solution

The fourth proportional to 427,622.50, 640,990.83 and 351,947.51 is: 527,556.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,622.50 : 640,990.83 = 351,947.51 : x
  2. Step 2: Convert to fraction form
    427,622.50/640,990.83 = 351,947.51/x
  3. Step 3: Cross multiply
    427,622.50x = 640,990.83 × 351,947.51
  4. Step 4: Simplify right side
    427,622.50x = 225,595,123,346.38
  5. Step 5: Solve for x
    x = 225,595,123,346.38/427,622.50
  6. Step 6: Final answer
    x = 527,556.73

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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.