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Finding the Third Proportional to 109.63 and 237.78

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Solution

The third proportional to 109.63 and 237.78 is: 515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.63 : 237.78 = 237.78 : x
  2. Step 2: Convert to fraction form
    109.63/237.78 = 237.78/x
  3. Step 3: Cross multiply
    109.63x = 237.78 × 237.78
  4. Step 4: Simplify right side
    109.63x = 56,538.99
  5. Step 5: Solve for x
    x = 56,538.99/109.63
  6. Step 6: Final answer
    x = 515.70

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.