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Finding the Fourth Proportional to 481.42, 663.67 and 315.57

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Solution

The fourth proportional to 481.42, 663.67 and 315.57 is: 435.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.42 : 663.67 = 315.57 : x
  2. Step 2: Convert to fraction form
    481.42/663.67 = 315.57/x
  3. Step 3: Cross multiply
    481.42x = 663.67 × 315.57
  4. Step 4: Simplify right side
    481.42x = 209,434.34
  5. Step 5: Solve for x
    x = 209,434.34/481.42
  6. Step 6: Final answer
    x = 435.03

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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.