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Finding the Fourth Proportional to 394,968.48, 545,055.60 and 216,120.48

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Solution

The fourth proportional to 394,968.48, 545,055.60 and 216,120.48 is: 298,245.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,968.48 : 545,055.60 = 216,120.48 : x
  2. Step 2: Convert to fraction form
    394,968.48/545,055.60 = 216,120.48/x
  3. Step 3: Cross multiply
    394,968.48x = 545,055.60 × 216,120.48
  4. Step 4: Simplify right side
    394,968.48x = 117,797,677,898.69
  5. Step 5: Solve for x
    x = 117,797,677,898.69/394,968.48
  6. Step 6: Final answer
    x = 298,245.77

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1.5x scale

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.