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Finding the Fourth Proportional to 672.48, 927.65 and 423.70

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Solution

The fourth proportional to 672.48, 927.65 and 423.70 is: 584.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.48 : 927.65 = 423.70 : x
  2. Step 2: Convert to fraction form
    672.48/927.65 = 423.70/x
  3. Step 3: Cross multiply
    672.48x = 927.65 × 423.70
  4. Step 4: Simplify right side
    672.48x = 393,044.05
  5. Step 5: Solve for x
    x = 393,044.05/672.48
  6. Step 6: Final answer
    x = 584.47

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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.