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Finding the Fourth Proportional to 399.93, 552.75 and 351.93

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Solution

The fourth proportional to 399.93, 552.75 and 351.93 is: 486.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.93 : 552.75 = 351.93 : x
  2. Step 2: Convert to fraction form
    399.93/552.75 = 351.93/x
  3. Step 3: Cross multiply
    399.93x = 552.75 × 351.93
  4. Step 4: Simplify right side
    399.93x = 194,529.31
  5. Step 5: Solve for x
    x = 194,529.31/399.93
  6. Step 6: Final answer
    x = 486.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.