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Finding the Fourth Proportional to 629.40, 942.66 and 615.72

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Solution

The fourth proportional to 629.40, 942.66 and 615.72 is: 922.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.40 : 942.66 = 615.72 : x
  2. Step 2: Convert to fraction form
    629.40/942.66 = 615.72/x
  3. Step 3: Cross multiply
    629.40x = 942.66 × 615.72
  4. Step 4: Simplify right side
    629.40x = 580,414.62
  5. Step 5: Solve for x
    x = 580,414.62/629.40
  6. Step 6: Final answer
    x = 922.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.