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Finding the Fourth Proportional to 934.20, 1,289.10 and 673.56

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Solution

The fourth proportional to 934.20, 1,289.10 and 673.56 is: 929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.20 : 1,289.10 = 673.56 : x
  2. Step 2: Convert to fraction form
    934.20/1,289.10 = 673.56/x
  3. Step 3: Cross multiply
    934.20x = 1,289.10 × 673.56
  4. Step 4: Simplify right side
    934.20x = 868,286.20
  5. Step 5: Solve for x
    x = 868,286.20/934.20
  6. Step 6: Final answer
    x = 929.44

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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.