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Finding the Fourth Proportional to 640,493.72, 883,884.80 and 350,105.68

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Solution

The fourth proportional to 640,493.72, 883,884.80 and 350,105.68 is: 483,147.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,493.72 : 883,884.80 = 350,105.68 : x
  2. Step 2: Convert to fraction form
    640,493.72/883,884.80 = 350,105.68/x
  3. Step 3: Cross multiply
    640,493.72x = 883,884.80 × 350,105.68
  4. Step 4: Simplify right side
    640,493.72x = 309,453,088,945.66
  5. Step 5: Solve for x
    x = 309,453,088,945.66/640,493.72
  6. Step 6: Final answer
    x = 483,147.73

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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.