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Finding the Fourth Proportional to 630.08, 943.16 and 399.20

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Solution

The fourth proportional to 630.08, 943.16 and 399.20 is: 597.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.08 : 943.16 = 399.20 : x
  2. Step 2: Convert to fraction form
    630.08/943.16 = 399.20/x
  3. Step 3: Cross multiply
    630.08x = 943.16 × 399.20
  4. Step 4: Simplify right side
    630.08x = 376,509.47
  5. Step 5: Solve for x
    x = 376,509.47/630.08
  6. Step 6: Final answer
    x = 597.56

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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.