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Finding the Fourth Proportional to 680.95, 933.17 and 615.34

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Solution

The fourth proportional to 680.95, 933.17 and 615.34 is: 843.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.95 : 933.17 = 615.34 : x
  2. Step 2: Convert to fraction form
    680.95/933.17 = 615.34/x
  3. Step 3: Cross multiply
    680.95x = 933.17 × 615.34
  4. Step 4: Simplify right side
    680.95x = 574,221.44
  5. Step 5: Solve for x
    x = 574,221.44/680.95
  6. Step 6: Final answer
    x = 843.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.