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Finding the Third Proportional to 245.85 and 423.35

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Solution

The third proportional to 245.85 and 423.35 is: 729.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.85 : 423.35 = 423.35 : x
  2. Step 2: Convert to fraction form
    245.85/423.35 = 423.35/x
  3. Step 3: Cross multiply
    245.85x = 423.35 × 423.35
  4. Step 4: Simplify right side
    245.85x = 179,226.55
  5. Step 5: Solve for x
    x = 179,226.55/245.85
  6. Step 6: Final answer
    x = 729.01

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.