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Finding the Third Proportional to 316,248 and 690,864

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Solution

The third proportional to 316,248 and 690,864 is: 1,509,236.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,248 : 690,864 = 690,864 : x
  2. Step 2: Convert to fraction form
    316,248/690,864 = 690,864/x
  3. Step 3: Cross multiply
    316,248x = 690,864 × 690,864
  4. Step 4: Simplify right side
    316,248x = 477,293,066,496
  5. Step 5: Solve for x
    x = 477,293,066,496/316,248
  6. Step 6: Final answer
    x = 1,509,236.63

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.