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Finding the Fourth Proportional to 640,166.94, 883,355.09 and 353,669.94

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Solution

The fourth proportional to 640,166.94, 883,355.09 and 353,669.94 is: 488,022.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,166.94 : 883,355.09 = 353,669.94 : x
  2. Step 2: Convert to fraction form
    640,166.94/883,355.09 = 353,669.94/x
  3. Step 3: Cross multiply
    640,166.94x = 883,355.09 × 353,669.94
  4. Step 4: Simplify right side
    640,166.94x = 312,416,139,910.65
  5. Step 5: Solve for x
    x = 312,416,139,910.65/640,166.94
  6. Step 6: Final answer
    x = 488,022.92

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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.