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Finding the Fourth Proportional to 646.81, 892.61 and 352.09

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Solution

The fourth proportional to 646.81, 892.61 and 352.09 is: 485.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.81 : 892.61 = 352.09 : x
  2. Step 2: Convert to fraction form
    646.81/892.61 = 352.09/x
  3. Step 3: Cross multiply
    646.81x = 892.61 × 352.09
  4. Step 4: Simplify right side
    646.81x = 314,279.05
  5. Step 5: Solve for x
    x = 314,279.05/646.81
  6. Step 6: Final answer
    x = 485.89

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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.