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Finding the Third Proportional to 175,678 and 390,654

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Solution

The third proportional to 175,678 and 390,654 is: 868,694.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    175,678 : 390,654 = 390,654 : x
  2. Step 2: Convert to fraction form
    175,678/390,654 = 390,654/x
  3. Step 3: Cross multiply
    175,678x = 390,654 × 390,654
  4. Step 4: Simplify right side
    175,678x = 152,610,547,716
  5. Step 5: Solve for x
    x = 152,610,547,716/175,678
  6. Step 6: Final answer
    x = 868,694.70

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.