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Finding the Fourth Proportional to 470.45, 648.60 and 322.82

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Solution

The fourth proportional to 470.45, 648.60 and 322.82 is: 445.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.45 : 648.60 = 322.82 : x
  2. Step 2: Convert to fraction form
    470.45/648.60 = 322.82/x
  3. Step 3: Cross multiply
    470.45x = 648.60 × 322.82
  4. Step 4: Simplify right side
    470.45x = 209,377.81
  5. Step 5: Solve for x
    x = 209,377.81/470.45
  6. Step 6: Final answer
    x = 445.06

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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.