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Finding the Fourth Proportional to 1,181.16, 1,631.85 and 902.37

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Solution

The fourth proportional to 1,181.16, 1,631.85 and 902.37 is: 1,246.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.16 : 1,631.85 = 902.37 : x
  2. Step 2: Convert to fraction form
    1,181.16/1,631.85 = 902.37/x
  3. Step 3: Cross multiply
    1,181.16x = 1,631.85 × 902.37
  4. Step 4: Simplify right side
    1,181.16x = 1,472,532.48
  5. Step 5: Solve for x
    x = 1,472,532.48/1,181.16
  6. Step 6: Final answer
    x = 1,246.68

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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.