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Finding the Third Proportional to 6,646.50 and 7,578

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Solution

The third proportional to 6,646.50 and 7,578 is: 8,640.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,646.50 : 7,578 = 7,578 : x
  2. Step 2: Convert to fraction form
    6,646.50/7,578 = 7,578/x
  3. Step 3: Cross multiply
    6,646.50x = 7,578 × 7,578
  4. Step 4: Simplify right side
    6,646.50x = 57,426,084
  5. Step 5: Solve for x
    x = 57,426,084/6,646.50
  6. Step 6: Final answer
    x = 8,640.05

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.