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Finding the Fourth Proportional to 642,558, 886,749.48 and 356,051.28

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Solution

The fourth proportional to 642,558, 886,749.48 and 356,051.28 is: 491,361.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,558 : 886,749.48 = 356,051.28 : x
  2. Step 2: Convert to fraction form
    642,558/886,749.48 = 356,051.28/x
  3. Step 3: Cross multiply
    642,558x = 886,749.48 × 356,051.28
  4. Step 4: Simplify right side
    642,558x = 315,728,287,393.33
  5. Step 5: Solve for x
    x = 315,728,287,393.33/642,558
  6. Step 6: Final answer
    x = 491,361.54

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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.