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Finding the Fourth Proportional to 959.38, 1,324.14 and 628.09

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Solution

The fourth proportional to 959.38, 1,324.14 and 628.09 is: 866.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.38 : 1,324.14 = 628.09 : x
  2. Step 2: Convert to fraction form
    959.38/1,324.14 = 628.09/x
  3. Step 3: Cross multiply
    959.38x = 1,324.14 × 628.09
  4. Step 4: Simplify right side
    959.38x = 831,679.09
  5. Step 5: Solve for x
    x = 831,679.09/959.38
  6. Step 6: Final answer
    x = 866.89

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Half scale
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Double scale
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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.