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Finding the Third Proportional to 406,960 and 630,888

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Solution

The third proportional to 406,960 and 630,888 is: 978,031.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,960 : 630,888 = 630,888 : x
  2. Step 2: Convert to fraction form
    406,960/630,888 = 630,888/x
  3. Step 3: Cross multiply
    406,960x = 630,888 × 630,888
  4. Step 4: Simplify right side
    406,960x = 398,019,668,544
  5. Step 5: Solve for x
    x = 398,019,668,544/406,960
  6. Step 6: Final answer
    x = 978,031.42

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.