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Finding the Fourth Proportional to 399.88, 597.37 and 318.81

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Solution

The fourth proportional to 399.88, 597.37 and 318.81 is: 476.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.88 : 597.37 = 318.81 : x
  2. Step 2: Convert to fraction form
    399.88/597.37 = 318.81/x
  3. Step 3: Cross multiply
    399.88x = 597.37 × 318.81
  4. Step 4: Simplify right side
    399.88x = 190,447.53
  5. Step 5: Solve for x
    x = 190,447.53/399.88
  6. Step 6: Final answer
    x = 476.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.