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Finding the Fourth Proportional to 399.81, 600.74 and 322.92

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Solution

The fourth proportional to 399.81, 600.74 and 322.92 is: 485.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.81 : 600.74 = 322.92 : x
  2. Step 2: Convert to fraction form
    399.81/600.74 = 322.92/x
  3. Step 3: Cross multiply
    399.81x = 600.74 × 322.92
  4. Step 4: Simplify right side
    399.81x = 193,994.00
  5. Step 5: Solve for x
    x = 193,994.00/399.81
  6. Step 6: Final answer
    x = 485.21

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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.