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Finding the Fourth Proportional to 640,476.63, 883,825.97 and 353,989.35

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Solution

The fourth proportional to 640,476.63, 883,825.97 and 353,989.35 is: 488,487.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,476.63 : 883,825.97 = 353,989.35 : x
  2. Step 2: Convert to fraction form
    640,476.63/883,825.97 = 353,989.35/x
  3. Step 3: Cross multiply
    640,476.63x = 883,825.97 × 353,989.35
  4. Step 4: Simplify right side
    640,476.63x = 312,864,978,863.47
  5. Step 5: Solve for x
    x = 312,864,978,863.47/640,476.63
  6. Step 6: Final answer
    x = 488,487.74

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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.