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Finding the Fourth Proportional to 1,072.76, 1,481.06 and 737.20

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Solution

The fourth proportional to 1,072.76, 1,481.06 and 737.20 is: 1,017.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.76 : 1,481.06 = 737.20 : x
  2. Step 2: Convert to fraction form
    1,072.76/1,481.06 = 737.20/x
  3. Step 3: Cross multiply
    1,072.76x = 1,481.06 × 737.20
  4. Step 4: Simplify right side
    1,072.76x = 1,091,837.43
  5. Step 5: Solve for x
    x = 1,091,837.43/1,072.76
  6. Step 6: Final answer
    x = 1,017.78

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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.