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Finding the Third Proportional to 119,370 and 257,421

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Solution

The third proportional to 119,370 and 257,421 is: 555,127.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,370 : 257,421 = 257,421 : x
  2. Step 2: Convert to fraction form
    119,370/257,421 = 257,421/x
  3. Step 3: Cross multiply
    119,370x = 257,421 × 257,421
  4. Step 4: Simplify right side
    119,370x = 66,265,571,241
  5. Step 5: Solve for x
    x = 66,265,571,241/119,370
  6. Step 6: Final answer
    x = 555,127.51

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.