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Finding the Fourth Proportional to 642,650.70, 886,858.07 and 356,189.28

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Solution

The fourth proportional to 642,650.70, 886,858.07 and 356,189.28 is: 491,541.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,650.70 : 886,858.07 = 356,189.28 : x
  2. Step 2: Convert to fraction form
    642,650.70/886,858.07 = 356,189.28/x
  3. Step 3: Cross multiply
    642,650.70x = 886,858.07 × 356,189.28
  4. Step 4: Simplify right side
    642,650.70x = 315,889,335,634.54
  5. Step 5: Solve for x
    x = 315,889,335,634.54/642,650.70
  6. Step 6: Final answer
    x = 491,541.26

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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.