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Finding the Fourth Proportional to 646.57, 892.24 and 351.84

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Solution

The fourth proportional to 646.57, 892.24 and 351.84 is: 485.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.57 : 892.24 = 351.84 : x
  2. Step 2: Convert to fraction form
    646.57/892.24 = 351.84/x
  3. Step 3: Cross multiply
    646.57x = 892.24 × 351.84
  4. Step 4: Simplify right side
    646.57x = 313,927.66
  5. Step 5: Solve for x
    x = 313,927.66/646.57
  6. Step 6: Final answer
    x = 485.52

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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.