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Finding the Fourth Proportional to 555.92, 764.96 and 539.88

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Solution

The fourth proportional to 555.92, 764.96 and 539.88 is: 742.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.92 : 764.96 = 539.88 : x
  2. Step 2: Convert to fraction form
    555.92/764.96 = 539.88/x
  3. Step 3: Cross multiply
    555.92x = 764.96 × 539.88
  4. Step 4: Simplify right side
    555.92x = 412,986.60
  5. Step 5: Solve for x
    x = 412,986.60/555.92
  6. Step 6: Final answer
    x = 742.89

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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.