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Finding the Fourth Proportional to 646.86, 892.65 and 352.11

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Solution

The fourth proportional to 646.86, 892.65 and 352.11 is: 485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.86 : 892.65 = 352.11 : x
  2. Step 2: Convert to fraction form
    646.86/892.65 = 352.11/x
  3. Step 3: Cross multiply
    646.86x = 892.65 × 352.11
  4. Step 4: Simplify right side
    646.86x = 314,310.99
  5. Step 5: Solve for x
    x = 314,310.99/646.86
  6. Step 6: Final answer
    x = 485.90

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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.