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Finding the Fourth Proportional to 646.38, 892.72 and 605.68

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Solution

The fourth proportional to 646.38, 892.72 and 605.68 is: 836.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.38 : 892.72 = 605.68 : x
  2. Step 2: Convert to fraction form
    646.38/892.72 = 605.68/x
  3. Step 3: Cross multiply
    646.38x = 892.72 × 605.68
  4. Step 4: Simplify right side
    646.38x = 540,701.17
  5. Step 5: Solve for x
    x = 540,701.17/646.38
  6. Step 6: Final answer
    x = 836.51

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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.