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Finding the Fourth Proportional to 640,310.30, 883,628.54 and 353,830.40

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Solution

The fourth proportional to 640,310.30, 883,628.54 and 353,830.40 is: 488,286.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,310.30 : 883,628.54 = 353,830.40 : x
  2. Step 2: Convert to fraction form
    640,310.30/883,628.54 = 353,830.40/x
  3. Step 3: Cross multiply
    640,310.30x = 883,628.54 × 353,830.40
  4. Step 4: Simplify right side
    640,310.30x = 312,654,639,759.62
  5. Step 5: Solve for x
    x = 312,654,639,759.62/640,310.30
  6. Step 6: Final answer
    x = 488,286.13

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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.