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Finding the Fourth Proportional to 672.06, 926.72 and 423.09

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Solution

The fourth proportional to 672.06, 926.72 and 423.09 is: 583.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.06 : 926.72 = 423.09 : x
  2. Step 2: Convert to fraction form
    672.06/926.72 = 423.09/x
  3. Step 3: Cross multiply
    672.06x = 926.72 × 423.09
  4. Step 4: Simplify right side
    672.06x = 392,083.85
  5. Step 5: Solve for x
    x = 392,083.85/672.06
  6. Step 6: Final answer
    x = 583.41

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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.