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Finding the Fourth Proportional to 1,274.52, 1,911.58 and 441.72

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Solution

The fourth proportional to 1,274.52, 1,911.58 and 441.72 is: 662.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.52 : 1,911.58 = 441.72 : x
  2. Step 2: Convert to fraction form
    1,274.52/1,911.58 = 441.72/x
  3. Step 3: Cross multiply
    1,274.52x = 1,911.58 × 441.72
  4. Step 4: Simplify right side
    1,274.52x = 844,383.12
  5. Step 5: Solve for x
    x = 844,383.12/1,274.52
  6. Step 6: Final answer
    x = 662.51

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.