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Finding the Fourth Proportional to 643,159.28, 887,614.36 and 356,771.63

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Solution

The fourth proportional to 643,159.28, 887,614.36 and 356,771.63 is: 492,375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,159.28 : 887,614.36 = 356,771.63 : x
  2. Step 2: Convert to fraction form
    643,159.28/887,614.36 = 356,771.63/x
  3. Step 3: Cross multiply
    643,159.28x = 887,614.36 × 356,771.63
  4. Step 4: Simplify right side
    643,159.28x = 316,675,616,698.61
  5. Step 5: Solve for x
    x = 316,675,616,698.61/643,159.28
  6. Step 6: Final answer
    x = 492,375.11

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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.