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Finding the Fourth Proportional to 626.63, 940.52 and 318.70

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Solution

The fourth proportional to 626.63, 940.52 and 318.70 is: 478.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.63 : 940.52 = 318.70 : x
  2. Step 2: Convert to fraction form
    626.63/940.52 = 318.70/x
  3. Step 3: Cross multiply
    626.63x = 940.52 × 318.70
  4. Step 4: Simplify right side
    626.63x = 299,743.72
  5. Step 5: Solve for x
    x = 299,743.72/626.63
  6. Step 6: Final answer
    x = 478.34

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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.