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Finding the Third Proportional to 929 and 1,977.50

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Solution

The third proportional to 929 and 1,977.50 is: 4,209.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    929 : 1,977.50 = 1,977.50 : x
  2. Step 2: Convert to fraction form
    929/1,977.50 = 1,977.50/x
  3. Step 3: Cross multiply
    929x = 1,977.50 × 1,977.50
  4. Step 4: Simplify right side
    929x = 3,910,506.25
  5. Step 5: Solve for x
    x = 3,910,506.25/929
  6. Step 6: Final answer
    x = 4,209.37

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.