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Finding the Fourth Proportional to 640,462.76, 883,884.36 and 353,976.68

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Solution

The fourth proportional to 640,462.76, 883,884.36 and 353,976.68 is: 488,513.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,462.76 : 883,884.36 = 353,976.68 : x
  2. Step 2: Convert to fraction form
    640,462.76/883,884.36 = 353,976.68/x
  3. Step 3: Cross multiply
    640,462.76x = 883,884.36 × 353,976.68
  4. Step 4: Simplify right side
    640,462.76x = 312,874,451,256.73
  5. Step 5: Solve for x
    x = 312,874,451,256.73/640,462.76
  6. Step 6: Final answer
    x = 488,513.10

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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.