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Finding the Fourth Proportional to 394,992.48, 545,088.72 and 216,144.48

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Solution

The fourth proportional to 394,992.48, 545,088.72 and 216,144.48 is: 298,278.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,992.48 : 545,088.72 = 216,144.48 : x
  2. Step 2: Convert to fraction form
    394,992.48/545,088.72 = 216,144.48/x
  3. Step 3: Cross multiply
    394,992.48x = 545,088.72 × 216,144.48
  4. Step 4: Simplify right side
    394,992.48x = 117,817,917,938.27
  5. Step 5: Solve for x
    x = 117,817,917,938.27/394,992.48
  6. Step 6: Final answer
    x = 298,278.89

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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.