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Finding the Fourth Proportional to 351.74, 527.96 and 215.06

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Solution

The fourth proportional to 351.74, 527.96 and 215.06 is: 322.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.74 : 527.96 = 215.06 : x
  2. Step 2: Convert to fraction form
    351.74/527.96 = 215.06/x
  3. Step 3: Cross multiply
    351.74x = 527.96 × 215.06
  4. Step 4: Simplify right side
    351.74x = 113,539.46
  5. Step 5: Solve for x
    x = 113,539.46/351.74
  6. Step 6: Final answer
    x = 322.79

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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.