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Finding the Fourth Proportional to 930.22, 1,394.61 and 443.50

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Solution

The fourth proportional to 930.22, 1,394.61 and 443.50 is: 664.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.22 : 1,394.61 = 443.50 : x
  2. Step 2: Convert to fraction form
    930.22/1,394.61 = 443.50/x
  3. Step 3: Cross multiply
    930.22x = 1,394.61 × 443.50
  4. Step 4: Simplify right side
    930.22x = 618,509.54
  5. Step 5: Solve for x
    x = 618,509.54/930.22
  6. Step 6: Final answer
    x = 664.91

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Double scale
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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.