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Finding the Fourth Proportional to 642,567.36, 886,732.56 and 356,086.56

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Solution

The fourth proportional to 642,567.36, 886,732.56 and 356,086.56 is: 491,393.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,567.36 : 886,732.56 = 356,086.56 : x
  2. Step 2: Convert to fraction form
    642,567.36/886,732.56 = 356,086.56/x
  3. Step 3: Cross multiply
    642,567.36x = 886,732.56 × 356,086.56
  4. Step 4: Simplify right side
    642,567.36x = 315,753,546,930.39
  5. Step 5: Solve for x
    x = 315,753,546,930.39/642,567.36
  6. Step 6: Final answer
    x = 491,393.69

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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.