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Finding the Fourth Proportional to 470.65, 648.12 and 339.43

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Solution

The fourth proportional to 470.65, 648.12 and 339.43 is: 467.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.65 : 648.12 = 339.43 : x
  2. Step 2: Convert to fraction form
    470.65/648.12 = 339.43/x
  3. Step 3: Cross multiply
    470.65x = 648.12 × 339.43
  4. Step 4: Simplify right side
    470.65x = 219,991.37
  5. Step 5: Solve for x
    x = 219,991.37/470.65
  6. Step 6: Final answer
    x = 467.42

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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.