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Finding the Fourth Proportional to 640,310.43, 883,628.71 and 353,830.52

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Solution

The fourth proportional to 640,310.43, 883,628.71 and 353,830.52 is: 488,286.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,310.43 : 883,628.71 = 353,830.52 : x
  2. Step 2: Convert to fraction form
    640,310.43/883,628.71 = 353,830.52/x
  3. Step 3: Cross multiply
    640,310.43x = 883,628.71 × 353,830.52
  4. Step 4: Simplify right side
    640,310.43x = 312,654,805,946.23
  5. Step 5: Solve for x
    x = 312,654,805,946.23/640,310.43
  6. Step 6: Final answer
    x = 488,286.29

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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.