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Finding the Fourth Proportional to 899.25, 1,240.55 and 637.41

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Solution

The fourth proportional to 899.25, 1,240.55 and 637.41 is: 879.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.25 : 1,240.55 = 637.41 : x
  2. Step 2: Convert to fraction form
    899.25/1,240.55 = 637.41/x
  3. Step 3: Cross multiply
    899.25x = 1,240.55 × 637.41
  4. Step 4: Simplify right side
    899.25x = 790,735.79
  5. Step 5: Solve for x
    x = 790,735.79/899.25
  6. Step 6: Final answer
    x = 879.33

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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.