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Finding the Fourth Proportional to 630.90, 946.92 and 338.64

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Solution

The fourth proportional to 630.90, 946.92 and 338.64 is: 508.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.90 : 946.92 = 338.64 : x
  2. Step 2: Convert to fraction form
    630.90/946.92 = 338.64/x
  3. Step 3: Cross multiply
    630.90x = 946.92 × 338.64
  4. Step 4: Simplify right side
    630.90x = 320,664.99
  5. Step 5: Solve for x
    x = 320,664.99/630.90
  6. Step 6: Final answer
    x = 508.27

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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.