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Finding the Fourth Proportional to 642,367.67, 886,496.41 and 355,887.75

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Solution

The fourth proportional to 642,367.67, 886,496.41 and 355,887.75 is: 491,141.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,367.67 : 886,496.41 = 355,887.75 : x
  2. Step 2: Convert to fraction form
    642,367.67/886,496.41 = 355,887.75/x
  3. Step 3: Cross multiply
    642,367.67x = 886,496.41 × 355,887.75
  4. Step 4: Simplify right side
    642,367.67x = 315,493,212,737.98
  5. Step 5: Solve for x
    x = 315,493,212,737.98/642,367.67
  6. Step 6: Final answer
    x = 491,141.18

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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.