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Finding the Fourth Proportional to 483.42, 667.80 and 385.06

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Solution

The fourth proportional to 483.42, 667.80 and 385.06 is: 531.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.42 : 667.80 = 385.06 : x
  2. Step 2: Convert to fraction form
    483.42/667.80 = 385.06/x
  3. Step 3: Cross multiply
    483.42x = 667.80 × 385.06
  4. Step 4: Simplify right side
    483.42x = 257,143.07
  5. Step 5: Solve for x
    x = 257,143.07/483.42
  6. Step 6: Final answer
    x = 531.92

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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.