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Finding the Third Proportional to 455,319 and 668,216

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Solution

The third proportional to 455,319 and 668,216 is: 980,658.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,319 : 668,216 = 668,216 : x
  2. Step 2: Convert to fraction form
    455,319/668,216 = 668,216/x
  3. Step 3: Cross multiply
    455,319x = 668,216 × 668,216
  4. Step 4: Simplify right side
    455,319x = 446,512,622,656
  5. Step 5: Solve for x
    x = 446,512,622,656/455,319
  6. Step 6: Final answer
    x = 980,658.88

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.