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Finding the Fourth Proportional to 394,943.84, 545,019.96 and 213,655.04

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Solution

The fourth proportional to 394,943.84, 545,019.96 and 213,655.04 is: 294,842.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,943.84 : 545,019.96 = 213,655.04 : x
  2. Step 2: Convert to fraction form
    394,943.84/545,019.96 = 213,655.04/x
  3. Step 3: Cross multiply
    394,943.84x = 545,019.96 × 213,655.04
  4. Step 4: Simplify right side
    394,943.84x = 116,446,261,354.60
  5. Step 5: Solve for x
    x = 116,446,261,354.60/394,943.84
  6. Step 6: Final answer
    x = 294,842.58

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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.