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Finding the Third Proportional to 312,099 and 471,428

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Solution

The third proportional to 312,099 and 471,428 is: 712,095.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,099 : 471,428 = 471,428 : x
  2. Step 2: Convert to fraction form
    312,099/471,428 = 471,428/x
  3. Step 3: Cross multiply
    312,099x = 471,428 × 471,428
  4. Step 4: Simplify right side
    312,099x = 222,244,359,184
  5. Step 5: Solve for x
    x = 222,244,359,184/312,099
  6. Step 6: Final answer
    x = 712,095.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.