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Finding the Fourth Proportional to 825.28, 1,237.92 and 441.28

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Solution

The fourth proportional to 825.28, 1,237.92 and 441.28 is: 661.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.28 : 1,237.92 = 441.28 : x
  2. Step 2: Convert to fraction form
    825.28/1,237.92 = 441.28/x
  3. Step 3: Cross multiply
    825.28x = 1,237.92 × 441.28
  4. Step 4: Simplify right side
    825.28x = 546,269.34
  5. Step 5: Solve for x
    x = 546,269.34/825.28
  6. Step 6: Final answer
    x = 661.92

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Half scale
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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.