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Finding the Fourth Proportional to 920.94, 1,272.92 and 674.04

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Solution

The fourth proportional to 920.94, 1,272.92 and 674.04 is: 931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.94 : 1,272.92 = 674.04 : x
  2. Step 2: Convert to fraction form
    920.94/1,272.92 = 674.04/x
  3. Step 3: Cross multiply
    920.94x = 1,272.92 × 674.04
  4. Step 4: Simplify right side
    920.94x = 857,999.00
  5. Step 5: Solve for x
    x = 857,999.00/920.94
  6. Step 6: Final answer
    x = 931.66

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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.