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Finding the Third Proportional to 255,776 and 401,240

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Solution

The third proportional to 255,776 and 401,240 is: 629,431.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,776 : 401,240 = 401,240 : x
  2. Step 2: Convert to fraction form
    255,776/401,240 = 401,240/x
  3. Step 3: Cross multiply
    255,776x = 401,240 × 401,240
  4. Step 4: Simplify right side
    255,776x = 160,993,537,600
  5. Step 5: Solve for x
    x = 160,993,537,600/255,776
  6. Step 6: Final answer
    x = 629,431.76

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.