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Finding the Fourth Proportional to 672.35, 927.78 and 377.61

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Solution

The fourth proportional to 672.35, 927.78 and 377.61 is: 521.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.35 : 927.78 = 377.61 : x
  2. Step 2: Convert to fraction form
    672.35/927.78 = 377.61/x
  3. Step 3: Cross multiply
    672.35x = 927.78 × 377.61
  4. Step 4: Simplify right side
    672.35x = 350,339.01
  5. Step 5: Solve for x
    x = 350,339.01/672.35
  6. Step 6: Final answer
    x = 521.07

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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.