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Finding the Fourth Proportional to 404,601.10, 606,901.65 and 278,629.90

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Solution

The fourth proportional to 404,601.10, 606,901.65 and 278,629.90 is: 417,944.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,601.10 : 606,901.65 = 278,629.90 : x
  2. Step 2: Convert to fraction form
    404,601.10/606,901.65 = 278,629.90/x
  3. Step 3: Cross multiply
    404,601.10x = 606,901.65 × 278,629.90
  4. Step 4: Simplify right side
    404,601.10x = 169,100,946,049.34
  5. Step 5: Solve for x
    x = 169,100,946,049.34/404,601.10
  6. Step 6: Final answer
    x = 417,944.85

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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.