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Finding the Third Proportional to 128.63 and 237

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Solution

The third proportional to 128.63 and 237 is: 436.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.63 : 237 = 237 : x
  2. Step 2: Convert to fraction form
    128.63/237 = 237/x
  3. Step 3: Cross multiply
    128.63x = 237 × 237
  4. Step 4: Simplify right side
    128.63x = 56,169
  5. Step 5: Solve for x
    x = 56,169/128.63
  6. Step 6: Final answer
    x = 436.69

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.