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Finding the Fourth Proportional to 672.20, 927.50 and 406.57

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Solution

The fourth proportional to 672.20, 927.50 and 406.57 is: 560.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.20 : 927.50 = 406.57 : x
  2. Step 2: Convert to fraction form
    672.20/927.50 = 406.57/x
  3. Step 3: Cross multiply
    672.20x = 927.50 × 406.57
  4. Step 4: Simplify right side
    672.20x = 377,093.35
  5. Step 5: Solve for x
    x = 377,093.35/672.20
  6. Step 6: Final answer
    x = 560.98

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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.