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Finding the Fourth Proportional to 1,181.36, 1,630.32 and 683.88

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Solution

The fourth proportional to 1,181.36, 1,630.32 and 683.88 is: 943.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.36 : 1,630.32 = 683.88 : x
  2. Step 2: Convert to fraction form
    1,181.36/1,630.32 = 683.88/x
  3. Step 3: Cross multiply
    1,181.36x = 1,630.32 × 683.88
  4. Step 4: Simplify right side
    1,181.36x = 1,114,943.24
  5. Step 5: Solve for x
    x = 1,114,943.24/1,181.36
  6. Step 6: Final answer
    x = 943.78

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1.5x scale

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.