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Finding the Fourth Proportional to 394,912.82, 544,412.85 and 281,538.74

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Solution

The fourth proportional to 394,912.82, 544,412.85 and 281,538.74 is: 388,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,912.82 : 544,412.85 = 281,538.74 : x
  2. Step 2: Convert to fraction form
    394,912.82/544,412.85 = 281,538.74/x
  3. Step 3: Cross multiply
    394,912.82x = 544,412.85 × 281,538.74
  4. Step 4: Simplify right side
    394,912.82x = 153,273,307,828.81
  5. Step 5: Solve for x
    x = 153,273,307,828.81/394,912.82
  6. Step 6: Final answer
    x = 388,119.35

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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.