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Finding the Third Proportional to 491,615 and 672,808

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Solution

The third proportional to 491,615 and 672,808 is: 920,782.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,615 : 672,808 = 672,808 : x
  2. Step 2: Convert to fraction form
    491,615/672,808 = 672,808/x
  3. Step 3: Cross multiply
    491,615x = 672,808 × 672,808
  4. Step 4: Simplify right side
    491,615x = 452,670,604,864
  5. Step 5: Solve for x
    x = 452,670,604,864/491,615
  6. Step 6: Final answer
    x = 920,782.74

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.