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Finding the Fourth Proportional to 630.60, 943.65 and 399.60

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Solution

The fourth proportional to 630.60, 943.65 and 399.60 is: 597.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.60 : 943.65 = 399.60 : x
  2. Step 2: Convert to fraction form
    630.60/943.65 = 399.60/x
  3. Step 3: Cross multiply
    630.60x = 943.65 × 399.60
  4. Step 4: Simplify right side
    630.60x = 377,082.54
  5. Step 5: Solve for x
    x = 377,082.54/630.60
  6. Step 6: Final answer
    x = 597.97

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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.