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Finding the Fourth Proportional to 290,428.74, 400,793.27 and 161,367.39

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Solution

The fourth proportional to 290,428.74, 400,793.27 and 161,367.39 is: 222,687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,428.74 : 400,793.27 = 161,367.39 : x
  2. Step 2: Convert to fraction form
    290,428.74/400,793.27 = 161,367.39/x
  3. Step 3: Cross multiply
    290,428.74x = 400,793.27 × 161,367.39
  4. Step 4: Simplify right side
    290,428.74x = 64,674,963,102.63
  5. Step 5: Solve for x
    x = 64,674,963,102.63/290,428.74
  6. Step 6: Final answer
    x = 222,687.89

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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.