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Finding the Fourth Proportional to 643,493.82, 888,004.57 and 353,104.49

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Solution

The fourth proportional to 643,493.82, 888,004.57 and 353,104.49 is: 487,274.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,493.82 : 888,004.57 = 353,104.49 : x
  2. Step 2: Convert to fraction form
    643,493.82/888,004.57 = 353,104.49/x
  3. Step 3: Cross multiply
    643,493.82x = 888,004.57 × 353,104.49
  4. Step 4: Simplify right side
    643,493.82x = 313,558,400,807.52
  5. Step 5: Solve for x
    x = 313,558,400,807.52/643,493.82
  6. Step 6: Final answer
    x = 487,274.92

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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.