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Finding the Fourth Proportional to 945.73, 1,412.21 and 772.73

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Solution

The fourth proportional to 945.73, 1,412.21 and 772.73 is: 1,153.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.73 : 1,412.21 = 772.73 : x
  2. Step 2: Convert to fraction form
    945.73/1,412.21 = 772.73/x
  3. Step 3: Cross multiply
    945.73x = 1,412.21 × 772.73
  4. Step 4: Simplify right side
    945.73x = 1,091,257.03
  5. Step 5: Solve for x
    x = 1,091,257.03/945.73
  6. Step 6: Final answer
    x = 1,153.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.