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Finding the Fourth Proportional to 481.34, 663.84 and 407.02

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Solution

The fourth proportional to 481.34, 663.84 and 407.02 is: 561.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.34 : 663.84 = 407.02 : x
  2. Step 2: Convert to fraction form
    481.34/663.84 = 407.02/x
  3. Step 3: Cross multiply
    481.34x = 663.84 × 407.02
  4. Step 4: Simplify right side
    481.34x = 270,196.16
  5. Step 5: Solve for x
    x = 270,196.16/481.34
  6. Step 6: Final answer
    x = 561.34

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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.