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Finding the Fourth Proportional to 640,469.80, 960,704.70 and 404,273.80

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Solution

The fourth proportional to 640,469.80, 960,704.70 and 404,273.80 is: 606,410.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,469.80 : 960,704.70 = 404,273.80 : x
  2. Step 2: Convert to fraction form
    640,469.80/960,704.70 = 404,273.80/x
  3. Step 3: Cross multiply
    640,469.80x = 960,704.70 × 404,273.80
  4. Step 4: Simplify right side
    640,469.80x = 388,387,739,746.86
  5. Step 5: Solve for x
    x = 388,387,739,746.86/640,469.80
  6. Step 6: Final answer
    x = 606,410.70

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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.