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Finding the Fourth Proportional to 944.60, 1,300.86 and 682.20

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Solution

The fourth proportional to 944.60, 1,300.86 and 682.20 is: 939.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.60 : 1,300.86 = 682.20 : x
  2. Step 2: Convert to fraction form
    944.60/1,300.86 = 682.20/x
  3. Step 3: Cross multiply
    944.60x = 1,300.86 × 682.20
  4. Step 4: Simplify right side
    944.60x = 887,446.69
  5. Step 5: Solve for x
    x = 887,446.69/944.60
  6. Step 6: Final answer
    x = 939.49

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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.