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Finding the Fourth Proportional to 351.72, 529.41 and 318.18

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Solution

The fourth proportional to 351.72, 529.41 and 318.18 is: 478.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.72 : 529.41 = 318.18 : x
  2. Step 2: Convert to fraction form
    351.72/529.41 = 318.18/x
  3. Step 3: Cross multiply
    351.72x = 529.41 × 318.18
  4. Step 4: Simplify right side
    351.72x = 168,447.67
  5. Step 5: Solve for x
    x = 168,447.67/351.72
  6. Step 6: Final answer
    x = 478.93

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.