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Finding the Third Proportional to 316,155 and 474,243

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Solution

The third proportional to 316,155 and 474,243 is: 711,380.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,155 : 474,243 = 474,243 : x
  2. Step 2: Convert to fraction form
    316,155/474,243 = 474,243/x
  3. Step 3: Cross multiply
    316,155x = 474,243 × 474,243
  4. Step 4: Simplify right side
    316,155x = 224,906,423,049
  5. Step 5: Solve for x
    x = 224,906,423,049/316,155
  6. Step 6: Final answer
    x = 711,380.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.