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Finding the Fourth Proportional to 672.73, 928.32 and 617.65

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Solution

The fourth proportional to 672.73, 928.32 and 617.65 is: 852.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.73 : 928.32 = 617.65 : x
  2. Step 2: Convert to fraction form
    672.73/928.32 = 617.65/x
  3. Step 3: Cross multiply
    672.73x = 928.32 × 617.65
  4. Step 4: Simplify right side
    672.73x = 573,376.85
  5. Step 5: Solve for x
    x = 573,376.85/672.73
  6. Step 6: Final answer
    x = 852.31

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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.