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Finding the Fourth Proportional to 674.47, 930.82 and 412.54

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Solution

The fourth proportional to 674.47, 930.82 and 412.54 is: 569.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.47 : 930.82 = 412.54 : x
  2. Step 2: Convert to fraction form
    674.47/930.82 = 412.54/x
  3. Step 3: Cross multiply
    674.47x = 930.82 × 412.54
  4. Step 4: Simplify right side
    674.47x = 384,000.48
  5. Step 5: Solve for x
    x = 384,000.48/674.47
  6. Step 6: Final answer
    x = 569.34

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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.