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Finding the Fourth Proportional to 394,960.74, 545,045.05 and 213,672.81

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Solution

The fourth proportional to 394,960.74, 545,045.05 and 213,672.81 is: 294,868.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,960.74 : 545,045.05 = 213,672.81 : x
  2. Step 2: Convert to fraction form
    394,960.74/545,045.05 = 213,672.81/x
  3. Step 3: Cross multiply
    394,960.74x = 545,045.05 × 213,672.81
  4. Step 4: Simplify right side
    394,960.74x = 116,461,307,410.09
  5. Step 5: Solve for x
    x = 116,461,307,410.09/394,960.74
  6. Step 6: Final answer
    x = 294,868.06

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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.