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Finding the Fourth Proportional to 482.85, 660.56 and 480.78

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Solution

The fourth proportional to 482.85, 660.56 and 480.78 is: 657.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.85 : 660.56 = 480.78 : x
  2. Step 2: Convert to fraction form
    482.85/660.56 = 480.78/x
  3. Step 3: Cross multiply
    482.85x = 660.56 × 480.78
  4. Step 4: Simplify right side
    482.85x = 317,581.63
  5. Step 5: Solve for x
    x = 317,581.63/482.85
  6. Step 6: Final answer
    x = 657.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.