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Finding the Fourth Proportional to 945.97, 1,305.45 and 552.92

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Solution

The fourth proportional to 945.97, 1,305.45 and 552.92 is: 763.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.97 : 1,305.45 = 552.92 : x
  2. Step 2: Convert to fraction form
    945.97/1,305.45 = 552.92/x
  3. Step 3: Cross multiply
    945.97x = 1,305.45 × 552.92
  4. Step 4: Simplify right side
    945.97x = 721,800.12
  5. Step 5: Solve for x
    x = 721,800.12/945.97
  6. Step 6: Final answer
    x = 763.03

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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.