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Finding the Third Proportional to 415.88 and 555.38

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Solution

The third proportional to 415.88 and 555.38 is: 741.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.88 : 555.38 = 555.38 : x
  2. Step 2: Convert to fraction form
    415.88/555.38 = 555.38/x
  3. Step 3: Cross multiply
    415.88x = 555.38 × 555.38
  4. Step 4: Simplify right side
    415.88x = 308,441.39
  5. Step 5: Solve for x
    x = 308,441.39/415.88
  6. Step 6: Final answer
    x = 741.67

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.