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Finding the Fourth Proportional to 630.48, 945 and 446.88

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Solution

The fourth proportional to 630.48, 945 and 446.88 is: 669.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.48 : 945 = 446.88 : x
  2. Step 2: Convert to fraction form
    630.48/945 = 446.88/x
  3. Step 3: Cross multiply
    630.48x = 945 × 446.88
  4. Step 4: Simplify right side
    630.48x = 422,301.60
  5. Step 5: Solve for x
    x = 422,301.60/630.48
  6. Step 6: Final answer
    x = 669.81

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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.