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Finding the Fourth Proportional to 640,843.30, 884,346.26 and 354,353.59

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Solution

The fourth proportional to 640,843.30, 884,346.26 and 354,353.59 is: 488,998.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,843.30 : 884,346.26 = 354,353.59 : x
  2. Step 2: Convert to fraction form
    640,843.30/884,346.26 = 354,353.59/x
  3. Step 3: Cross multiply
    640,843.30x = 884,346.26 × 354,353.59
  4. Step 4: Simplify right side
    640,843.30x = 313,371,266,393.29
  5. Step 5: Solve for x
    x = 313,371,266,393.29/640,843.30
  6. Step 6: Final answer
    x = 488,998.28

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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.