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Finding the Fourth Proportional to 672.43, 928.36 and 423.97

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Solution

The fourth proportional to 672.43, 928.36 and 423.97 is: 585.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.43 : 928.36 = 423.97 : x
  2. Step 2: Convert to fraction form
    672.43/928.36 = 423.97/x
  3. Step 3: Cross multiply
    672.43x = 928.36 × 423.97
  4. Step 4: Simplify right side
    672.43x = 393,596.79
  5. Step 5: Solve for x
    x = 393,596.79/672.43
  6. Step 6: Final answer
    x = 585.33

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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.