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Finding the Fourth Proportional to 669.60, 923.62 and 482.80

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Solution

The fourth proportional to 669.60, 923.62 and 482.80 is: 665.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.60 : 923.62 = 482.80 : x
  2. Step 2: Convert to fraction form
    669.60/923.62 = 482.80/x
  3. Step 3: Cross multiply
    669.60x = 923.62 × 482.80
  4. Step 4: Simplify right side
    669.60x = 445,923.74
  5. Step 5: Solve for x
    x = 445,923.74/669.60
  6. Step 6: Final answer
    x = 665.96

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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.