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Finding the Fourth Proportional to 674.21, 1,011.28 and 235.32

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Solution

The fourth proportional to 674.21, 1,011.28 and 235.32 is: 352.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.21 : 1,011.28 = 235.32 : x
  2. Step 2: Convert to fraction form
    674.21/1,011.28 = 235.32/x
  3. Step 3: Cross multiply
    674.21x = 1,011.28 × 235.32
  4. Step 4: Simplify right side
    674.21x = 237,973.23
  5. Step 5: Solve for x
    x = 237,973.23/674.21
  6. Step 6: Final answer
    x = 352.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.