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Finding the Fourth Proportional to 945.82, 1,305.07 and 552.79

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Solution

The fourth proportional to 945.82, 1,305.07 and 552.79 is: 762.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.82 : 1,305.07 = 552.79 : x
  2. Step 2: Convert to fraction form
    945.82/1,305.07 = 552.79/x
  3. Step 3: Cross multiply
    945.82x = 1,305.07 × 552.79
  4. Step 4: Simplify right side
    945.82x = 721,429.65
  5. Step 5: Solve for x
    x = 721,429.65/945.82
  6. Step 6: Final answer
    x = 762.76

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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.