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Finding the Fourth Proportional to 483.57, 666.55 and 378.49

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Solution

The fourth proportional to 483.57, 666.55 and 378.49 is: 521.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.57 : 666.55 = 378.49 : x
  2. Step 2: Convert to fraction form
    483.57/666.55 = 378.49/x
  3. Step 3: Cross multiply
    483.57x = 666.55 × 378.49
  4. Step 4: Simplify right side
    483.57x = 252,283.82
  5. Step 5: Solve for x
    x = 252,283.82/483.57
  6. Step 6: Final answer
    x = 521.71

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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.