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Finding the Fourth Proportional to 711.40, 1,067.10 and 633.10

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Solution

The fourth proportional to 711.40, 1,067.10 and 633.10 is: 949.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.40 : 1,067.10 = 633.10 : x
  2. Step 2: Convert to fraction form
    711.40/1,067.10 = 633.10/x
  3. Step 3: Cross multiply
    711.40x = 1,067.10 × 633.10
  4. Step 4: Simplify right side
    711.40x = 675,581.01
  5. Step 5: Solve for x
    x = 675,581.01/711.40
  6. Step 6: Final answer
    x = 949.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.