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Finding the Fourth Proportional to 475.31, 713.06 and 218.81

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Solution

The fourth proportional to 475.31, 713.06 and 218.81 is: 328.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.31 : 713.06 = 218.81 : x
  2. Step 2: Convert to fraction form
    475.31/713.06 = 218.81/x
  3. Step 3: Cross multiply
    475.31x = 713.06 × 218.81
  4. Step 4: Simplify right side
    475.31x = 156,026.17
  5. Step 5: Solve for x
    x = 156,026.17/475.31
  6. Step 6: Final answer
    x = 328.26

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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.