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Finding the Third Proportional to 212.63 and 307.13

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Solution

The third proportional to 212.63 and 307.13 is: 443.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.63 : 307.13 = 307.13 : x
  2. Step 2: Convert to fraction form
    212.63/307.13 = 307.13/x
  3. Step 3: Cross multiply
    212.63x = 307.13 × 307.13
  4. Step 4: Simplify right side
    212.63x = 94,325.77
  5. Step 5: Solve for x
    x = 94,325.77/212.63
  6. Step 6: Final answer
    x = 443.63

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.