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Finding the Fourth Proportional to 642,474.78, 886,601.97 and 355,992.36

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Solution

The fourth proportional to 642,474.78, 886,601.97 and 355,992.36 is: 491,262.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,474.78 : 886,601.97 = 355,992.36 : x
  2. Step 2: Convert to fraction form
    642,474.78/886,601.97 = 355,992.36/x
  3. Step 3: Cross multiply
    642,474.78x = 886,601.97 × 355,992.36
  4. Step 4: Simplify right side
    642,474.78x = 315,623,527,680.95
  5. Step 5: Solve for x
    x = 315,623,527,680.95/642,474.78
  6. Step 6: Final answer
    x = 491,262.13

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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.