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Finding the Fourth Proportional to 422,617.31, 583,028.60 and 279,576.57

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Solution

The fourth proportional to 422,617.31, 583,028.60 and 279,576.57 is: 385,694.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,617.31 : 583,028.60 = 279,576.57 : x
  2. Step 2: Convert to fraction form
    422,617.31/583,028.60 = 279,576.57/x
  3. Step 3: Cross multiply
    422,617.31x = 583,028.60 × 279,576.57
  4. Step 4: Simplify right side
    422,617.31x = 163,001,136,199.90
  5. Step 5: Solve for x
    x = 163,001,136,199.90/422,617.31
  6. Step 6: Final answer
    x = 385,694.42

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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.