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Finding the Fourth Proportional to 902.44, 1,244.63 and 637.77

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Solution

The fourth proportional to 902.44, 1,244.63 and 637.77 is: 879.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.44 : 1,244.63 = 637.77 : x
  2. Step 2: Convert to fraction form
    902.44/1,244.63 = 637.77/x
  3. Step 3: Cross multiply
    902.44x = 1,244.63 × 637.77
  4. Step 4: Simplify right side
    902.44x = 793,787.60
  5. Step 5: Solve for x
    x = 793,787.60/902.44
  6. Step 6: Final answer
    x = 879.60

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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.