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Finding the Fourth Proportional to 646.59, 892.31 and 351.87

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Solution

The fourth proportional to 646.59, 892.31 and 351.87 is: 485.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.59 : 892.31 = 351.87 : x
  2. Step 2: Convert to fraction form
    646.59/892.31 = 351.87/x
  3. Step 3: Cross multiply
    646.59x = 892.31 × 351.87
  4. Step 4: Simplify right side
    646.59x = 313,973.10
  5. Step 5: Solve for x
    x = 313,973.10/646.59
  6. Step 6: Final answer
    x = 485.59

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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.