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Finding the Third Proportional to 211,609.50 and 287,068.50

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Solution

The third proportional to 211,609.50 and 287,068.50 is: 389,435.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,609.50 : 287,068.50 = 287,068.50 : x
  2. Step 2: Convert to fraction form
    211,609.50/287,068.50 = 287,068.50/x
  3. Step 3: Cross multiply
    211,609.50x = 287,068.50 × 287,068.50
  4. Step 4: Simplify right side
    211,609.50x = 82,408,323,692.25
  5. Step 5: Solve for x
    x = 82,408,323,692.25/211,609.50
  6. Step 6: Final answer
    x = 389,435.84

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.