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Finding the Third Proportional to 257,282 and 397,587

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Solution

The third proportional to 257,282 and 397,587 is: 614,405.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,282 : 397,587 = 397,587 : x
  2. Step 2: Convert to fraction form
    257,282/397,587 = 397,587/x
  3. Step 3: Cross multiply
    257,282x = 397,587 × 397,587
  4. Step 4: Simplify right side
    257,282x = 158,075,422,569
  5. Step 5: Solve for x
    x = 158,075,422,569/257,282
  6. Step 6: Final answer
    x = 614,405.29

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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.