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Finding the Fourth Proportional to 1,270.92, 1,754.10 and 739.89

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Solution

The fourth proportional to 1,270.92, 1,754.10 and 739.89 is: 1,021.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.92 : 1,754.10 = 739.89 : x
  2. Step 2: Convert to fraction form
    1,270.92/1,754.10 = 739.89/x
  3. Step 3: Cross multiply
    1,270.92x = 1,754.10 × 739.89
  4. Step 4: Simplify right side
    1,270.92x = 1,297,841.05
  5. Step 5: Solve for x
    x = 1,297,841.05/1,270.92
  6. Step 6: Final answer
    x = 1,021.18

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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.