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Finding the Fourth Proportional to 640,271.97, 883,563.06 and 353,785.89

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Solution

The fourth proportional to 640,271.97, 883,563.06 and 353,785.89 is: 488,217.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,271.97 : 883,563.06 = 353,785.89 : x
  2. Step 2: Convert to fraction form
    640,271.97/883,563.06 = 353,785.89/x
  3. Step 3: Cross multiply
    640,271.97x = 883,563.06 × 353,785.89
  4. Step 4: Simplify right side
    640,271.97x = 312,592,143,553.22
  5. Step 5: Solve for x
    x = 312,592,143,553.22/640,271.97
  6. Step 6: Final answer
    x = 488,217.75

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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.