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Finding the Third Proportional to 649 and 1,130.50

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Solution

The third proportional to 649 and 1,130.50 is: 1,969.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    649 : 1,130.50 = 1,130.50 : x
  2. Step 2: Convert to fraction form
    649/1,130.50 = 1,130.50/x
  3. Step 3: Cross multiply
    649x = 1,130.50 × 1,130.50
  4. Step 4: Simplify right side
    649x = 1,278,030.25
  5. Step 5: Solve for x
    x = 1,278,030.25/649
  6. Step 6: Final answer
    x = 1,969.23

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Why These Related Problems?

These problems maintain the same ratio (1.74) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.