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Finding the Fourth Proportional to 672.66, 928.31 and 377.91

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Solution

The fourth proportional to 672.66, 928.31 and 377.91 is: 521.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.66 : 928.31 = 377.91 : x
  2. Step 2: Convert to fraction form
    672.66/928.31 = 377.91/x
  3. Step 3: Cross multiply
    672.66x = 928.31 × 377.91
  4. Step 4: Simplify right side
    672.66x = 350,815.74
  5. Step 5: Solve for x
    x = 350,815.74/672.66
  6. Step 6: Final answer
    x = 521.54

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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.