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Finding the Third Proportional to 118,210.50 and 256,515

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Solution

The third proportional to 118,210.50 and 256,515 is: 556,633.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,210.50 : 256,515 = 256,515 : x
  2. Step 2: Convert to fraction form
    118,210.50/256,515 = 256,515/x
  3. Step 3: Cross multiply
    118,210.50x = 256,515 × 256,515
  4. Step 4: Simplify right side
    118,210.50x = 65,799,945,225
  5. Step 5: Solve for x
    x = 65,799,945,225/118,210.50
  6. Step 6: Final answer
    x = 556,633.68

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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.