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Finding the Fourth Proportional to 399.66, 600.30 and 308.55

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Solution

The fourth proportional to 399.66, 600.30 and 308.55 is: 463.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.66 : 600.30 = 308.55 : x
  2. Step 2: Convert to fraction form
    399.66/600.30 = 308.55/x
  3. Step 3: Cross multiply
    399.66x = 600.30 × 308.55
  4. Step 4: Simplify right side
    399.66x = 185,222.57
  5. Step 5: Solve for x
    x = 185,222.57/399.66
  6. Step 6: Final answer
    x = 463.45

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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.