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Finding the Fourth Proportional to 646.26, 891.88 and 366.49

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Solution

The fourth proportional to 646.26, 891.88 and 366.49 is: 505.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.26 : 891.88 = 366.49 : x
  2. Step 2: Convert to fraction form
    646.26/891.88 = 366.49/x
  3. Step 3: Cross multiply
    646.26x = 891.88 × 366.49
  4. Step 4: Simplify right side
    646.26x = 326,865.10
  5. Step 5: Solve for x
    x = 326,865.10/646.26
  6. Step 6: Final answer
    x = 505.78

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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.