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Finding the Third Proportional to 170,418 and 358,459

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Solution

The third proportional to 170,418 and 358,459 is: 753,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,418 : 358,459 = 358,459 : x
  2. Step 2: Convert to fraction form
    170,418/358,459 = 358,459/x
  3. Step 3: Cross multiply
    170,418x = 358,459 × 358,459
  4. Step 4: Simplify right side
    170,418x = 128,492,854,681
  5. Step 5: Solve for x
    x = 128,492,854,681/170,418
  6. Step 6: Final answer
    x = 753,986.40

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.