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Finding the Fourth Proportional to 640,168.94, 883,357.85 and 353,671.94

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Solution

The fourth proportional to 640,168.94, 883,357.85 and 353,671.94 is: 488,025.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,168.94 : 883,357.85 = 353,671.94 : x
  2. Step 2: Convert to fraction form
    640,168.94/883,357.85 = 353,671.94/x
  3. Step 3: Cross multiply
    640,168.94x = 883,357.85 × 353,671.94
  4. Step 4: Simplify right side
    640,168.94x = 312,418,882,755.37
  5. Step 5: Solve for x
    x = 312,418,882,755.37/640,168.94
  6. Step 6: Final answer
    x = 488,025.68

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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.