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Finding the Third Proportional to 407.11 and 719.30

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Solution

The third proportional to 407.11 and 719.30 is: 1,270.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.11 : 719.30 = 719.30 : x
  2. Step 2: Convert to fraction form
    407.11/719.30 = 719.30/x
  3. Step 3: Cross multiply
    407.11x = 719.30 × 719.30
  4. Step 4: Simplify right side
    407.11x = 517,387.99
  5. Step 5: Solve for x
    x = 517,387.99/407.11
  6. Step 6: Final answer
    x = 1,270.88

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.