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Finding the Fourth Proportional to 290,331.28, 399,827.64 and 261,404.56

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Solution

The fourth proportional to 290,331.28, 399,827.64 and 261,404.56 is: 359,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,331.28 : 399,827.64 = 261,404.56 : x
  2. Step 2: Convert to fraction form
    290,331.28/399,827.64 = 261,404.56/x
  3. Step 3: Cross multiply
    290,331.28x = 399,827.64 × 261,404.56
  4. Step 4: Simplify right side
    290,331.28x = 104,516,768,310.04
  5. Step 5: Solve for x
    x = 104,516,768,310.04/290,331.28
  6. Step 6: Final answer
    x = 359,991.42

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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.