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Finding the Fourth Proportional to 1,180.20, 1,628.76 and 682.68

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Solution

The fourth proportional to 1,180.20, 1,628.76 and 682.68 is: 942.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.20 : 1,628.76 = 682.68 : x
  2. Step 2: Convert to fraction form
    1,180.20/1,628.76 = 682.68/x
  3. Step 3: Cross multiply
    1,180.20x = 1,628.76 × 682.68
  4. Step 4: Simplify right side
    1,180.20x = 1,111,921.88
  5. Step 5: Solve for x
    x = 1,111,921.88/1,180.20
  6. Step 6: Final answer
    x = 942.15

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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.