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Finding the Fourth Proportional to 474.21, 654.39 and 267.21

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Solution

The fourth proportional to 474.21, 654.39 and 267.21 is: 368.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.21 : 654.39 = 267.21 : x
  2. Step 2: Convert to fraction form
    474.21/654.39 = 267.21/x
  3. Step 3: Cross multiply
    474.21x = 654.39 × 267.21
  4. Step 4: Simplify right side
    474.21x = 174,859.55
  5. Step 5: Solve for x
    x = 174,859.55/474.21
  6. Step 6: Final answer
    x = 368.74

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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.