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Finding the Third Proportional to 973 and 2,121.50

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Solution

The third proportional to 973 and 2,121.50 is: 4,625.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    973 : 2,121.50 = 2,121.50 : x
  2. Step 2: Convert to fraction form
    973/2,121.50 = 2,121.50/x
  3. Step 3: Cross multiply
    973x = 2,121.50 × 2,121.50
  4. Step 4: Simplify right side
    973x = 4,500,762.25
  5. Step 5: Solve for x
    x = 4,500,762.25/973
  6. Step 6: Final answer
    x = 4,625.65

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.