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Finding the Fourth Proportional to 1,181.72, 1,765.75 and 902.46

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Solution

The fourth proportional to 1,181.72, 1,765.75 and 902.46 is: 1,348.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.72 : 1,765.75 = 902.46 : x
  2. Step 2: Convert to fraction form
    1,181.72/1,765.75 = 902.46/x
  3. Step 3: Cross multiply
    1,181.72x = 1,765.75 × 902.46
  4. Step 4: Simplify right side
    1,181.72x = 1,593,518.75
  5. Step 5: Solve for x
    x = 1,593,518.75/1,181.72
  6. Step 6: Final answer
    x = 1,348.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.