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Finding the Fourth Proportional to 643,164.30, 887,523.48 and 356,673.78

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Solution

The fourth proportional to 643,164.30, 887,523.48 and 356,673.78 is: 492,185.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,164.30 : 887,523.48 = 356,673.78 : x
  2. Step 2: Convert to fraction form
    643,164.30/887,523.48 = 356,673.78/x
  3. Step 3: Cross multiply
    643,164.30x = 887,523.48 × 356,673.78
  4. Step 4: Simplify right side
    643,164.30x = 316,556,354,450.35
  5. Step 5: Solve for x
    x = 316,556,354,450.35/643,164.30
  6. Step 6: Final answer
    x = 492,185.83

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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.